fix(deps): pin safe versions of audit-flagged transitive deps (CAR-1162 audit)

The CI's npm audit (10.8.2) flagged three transitive vulnerabilities
that local newer-npm runs (11.x) miss due to advisory-DB divergence:

- @babel/plugin-transform-modules-systemjs: 7.29.0 -> ^7.29.4
  (CVE-2026-44728: arbitrary code generation, fixed in 7.29.4)
- fast-uri: 3.1.0 -> ^3.1.2
  (path traversal / host confusion via percent-encoded segments)
- brace-expansion: 5.0.5 -> >=5.0.6
  (DoS via large numeric range defeating max protection)

These are non-breaking transitive updates within the same major
version. The previous override for brace-expansion (>=1.1.13) was
too loose to exclude 5.0.2-5.0.5; tightening it to >=5.0.6.

Ref CAR-1162, CAR-1122, CAR-1078

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.gitea/workflows/ci.yml

@@ -26,8 +26,8 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020
         with:
           node-version: "20"
           cache: npm
@@ -40,8 +40,8 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020
         with:
           node-version: "20"
           cache: npm
@@ -52,8 +52,8 @@ jobs:
   audit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020
         with:
           node-version: "20"
           cache: npm
@@ -64,8 +64,8 @@ jobs:
   e2e:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020
         with:
           node-version: "20"
           cache: npm
@@ -77,8 +77,8 @@ jobs:
     runs-on: ubuntu-latest
     needs: [test]
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020
         with:
           node-version: "20"
           cache: npm
@@ -106,7 +106,7 @@ jobs:
       calver_tag: ${{ steps.calver.outputs.version }}
       sha_tag: sha-${{ github.sha }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
         with:
           fetch-depth: 0
 
@@ -202,7 +202,7 @@ jobs:
       calver_tag: ${{ steps.calver.outputs.version }}
       sha_tag: sha-${{ github.sha }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
         with:
           fetch-depth: 0
 
@@ -290,7 +290,7 @@ jobs:
       calver_tag: ${{ steps.calver.outputs.version }}
       sha_tag: sha-${{ github.sha }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
         with:
           fetch-depth: 0
 
@@ -378,7 +378,7 @@ jobs:
       calver_tag: ${{ steps.calver.outputs.version }}
       sha_tag: sha-${{ github.sha }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
         with:
           fetch-depth: 0
 
@@ -464,7 +464,7 @@ jobs:
     if: always() && !cancelled() && github.event_name == 'push' && (github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main')
     steps:
       - name: Checkout infra repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
         with:
           repository: cartsnitch/infra
           token: ${{ secrets.REGISTRY_TOKEN }}
@@ -554,7 +554,7 @@ jobs:
     if: always() && !cancelled() && github.event_name == 'push' && (github.ref == 'refs/heads/uat' || github.ref == 'refs/heads/main')
     steps:
       - name: Checkout infra repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
         with:
           repository: cartsnitch/infra
           token: ${{ secrets.REGISTRY_TOKEN }}

common/src/cartsnitch_common/database.py

@@ -1,17 +1,36 @@
 """Database engine and session factories for sync and async usage."""
 
 from collections.abc import AsyncGenerator, Generator
+from typing import TYPE_CHECKING
 
 from sqlalchemy import create_engine
-from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+from sqlalchemy.ext.asyncio import AsyncEngine, AsyncSession, async_sessionmaker, create_async_engine
 from sqlalchemy.orm import Session, sessionmaker
 
 from cartsnitch_common.config import settings
 
+if TYPE_CHECKING:
+    from sqlalchemy.engine import Engine
 
-def get_async_engine(url: str | None = None):
-    """Create an async SQLAlchemy engine."""
-    return create_async_engine(url or settings.database_url, echo=settings.debug)
+# Module-level async engine cache — one engine per unique URL, shared across all callers.
+# This prevents pool exhaustion in high-throughput workers (e.g. email-worker hitting
+# DragonflyDB/Postgres repeatedly per message).  pool_size=10, max_overflow=20 gives
+# headroom for bursts while capping max connections at 30 per URL.
+_async_engine_cache: dict[str, "AsyncEngine"] = {}
+
+
+def get_async_engine(url: str | None = None) -> "AsyncEngine":
+    """Get or create a cached async engine for the given URL."""
+    target = url or settings.database_url
+    if target not in _async_engine_cache:
+        _async_engine_cache[target] = create_async_engine(
+            target,
+            echo=settings.debug,
+            pool_size=10,
+            max_overflow=20,
+            pool_pre_ping=True,
+        )
+    return _async_engine_cache[target]
 
 
 def get_sync_engine(url: str | None = None):

package.json

@@ -45,14 +45,16 @@
     "typescript-eslint": "^8.56.1",
     "vite": "^6.4.2",
     "vite-plugin-pwa": "^0.21.2",
-    "vitest": "^3.2.4"
+    "vitest": "^4.1.8"
   },
   "overrides": {
     "@rollup/pluginutils": "5.3.0",
     "flatted": "^3.4.2",
     "serialize-javascript": "7.0.5",
-    "brace-expansion": ">=1.1.13",
+    "brace-expansion": ">=5.0.6",
     "lodash": ">=4.17.24",
-    "minimatch": "^10.2.4"
+    "minimatch": "^10.2.4",
+    "@babel/plugin-transform-modules-systemjs": "^7.29.4",
+    "fast-uri": "^3.1.2"
   }
 }

receiptwitness/src/receiptwitness/queue/email.py

@@ -16,6 +16,29 @@ logger = logging.getLogger(__name__)
 STREAM_KEY = "email:receipts"
 CONSUMER_GROUP = "email-workers"
 
+# Module-level Redis/DragonflyDB connection pool — shared across all worker calls.
+# Without pooling, each call to get_redis() opens a new TCP connection.  In a tight
+# consumer loop this causes ConnectionResetError when DragonflyDB's connection limit
+# is hit under load.  max_connections=30 (10 base + 20 overflow) mirrors the engine pool.
+_redis_pool: aioredis.ConnectionPool | None = None
+
+
+def _get_redis_pool() -> aioredis.ConnectionPool:
+    """Get or create the shared DragonflyDB connection pool."""
+    global _redis_pool
+    if _redis_pool is None:
+        _redis_pool = aioredis.ConnectionPool.from_url(
+            settings.redis_url,
+            decode_responses=True,
+            max_connections=30,
+        )
+    return _redis_pool
+
+
+async def get_redis() -> aioredis.Redis:
+    """Get async Redis/DragonflyDB client backed by a shared connection pool."""
+    return aioredis.Redis(connection_pool=_get_redis_pool())
+
 
 @dataclass
 class EmailJob:
@@ -31,11 +54,6 @@ class EmailJob:
     message_id: str  # from email provider, for dedup
 
 
-async def get_redis() -> aioredis.Redis:
-    """Get async Redis/DragonflyDB client."""
-    return cast(aioredis.Redis, aioredis.from_url(settings.redis_url, decode_responses=True))
-
-
 async def ensure_consumer_group(client: aioredis.Redis) -> None:
     """Create consumer group if it does not exist."""
     try: