feat(db): auth_provider_config table + AES-256-GCM encryption helpers

Renumbered migration 0021 → 0023 to resolve conflict with pet_image and
logo_key migrations that landed on main after this branch was created.

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

packages/db/migrations/0023_auth_provider_config.sql

@@ -0,0 +1,14 @@
+CREATE TABLE "auth_provider_config" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"provider_id" text NOT NULL,
+	"display_name" text NOT NULL,
+	"issuer_url" text NOT NULL,
+	"internal_base_url" text,
+	"client_id" text NOT NULL,
+	"client_secret" text NOT NULL,
+	"scopes" text DEFAULT 'openid profile email' NOT NULL,
+	"enabled" boolean DEFAULT true NOT NULL,
+	"created_at" timestamp DEFAULT now() NOT NULL,
+	"updated_at" timestamp DEFAULT now() NOT NULL,
+	CONSTRAINT "auth_provider_config_provider_id_unique" UNIQUE("provider_id")
+);

packages/db/migrations/meta/_journal.json

@@ -162,6 +162,13 @@
       "when": 1775223267192,
       "tag": "0022_logo_key",
       "breakpoints": true
+    },
+    {
+      "idx": 23,
+      "version": "7",
+      "when": 1775309667192,
+      "tag": "0023_auth_provider_config",
+      "breakpoints": true
     }
   ]
 }