feat: replace K8s log streaming with PVC filesystem tailing

- Replaced streamPodLogs / streamPodLogsOnce / readPodLogs / waitForPodTermination
  with tailPodLogFile() that polls a shared PVC file path with adaptive cadence
  (250ms active, 1000ms idle after 5 consecutive empty polls)
- Added buildPodLogPath() export and podLogPath to JobBuildResult
- Added assertSafePathComponent with [a-zA-Z0-9-:] allowance for UUIDs
- Updated Job manifest to tee stdout to /paperclip/instances/default/run-logs/<companyId>/<agentId>/<runId>.pod.ndjson
- Added hasOutOfProcessLiveness: true to createServerAdapter (cast required)
- Deleted log-dedup.ts and log-dedup.test.ts entirely
- Removed all LogLineDedupFilter, Writable, and LOG_STREAM_* constants
- Removed completionResult.status workaround (completionWithGrace returns directly)
- Test infrastructure: mocked node:fs/promises to prevent unmocked fs.stat hangs

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/server/index.ts

@@ -34,7 +34,11 @@ export function createServerAdapter(): ServerAdapterModule {
         maxSessionAgeHours: 24,
       },
     },
-  };
+    // Tells the reaper to skip local PID checks and use the staleness-based
+    // liveness window instead (adapter spawns K8s Jobs in separate pods).
+    // Cast required: adapter-utils ServerAdapterModule type predates this field.
+    hasOutOfProcessLiveness: true,
+  } as ServerAdapterModule;
 }
 
 export { execute, testEnvironment, sessionCodec };