v2: fix container launch for v2 agent-runner

- Override entrypoint to compile and run index-v2.js (no stdin)
- Add better-sqlite3 + @types to agent-runner dependencies
- Exclude test files from agent-runner tsconfig (Docker build)
- Add real e2e test script (host → container → Claude → session DB)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

container/agent-runner/tsconfig.json

@@ -11,5 +11,5 @@
     "declaration": true
   },
   "include": ["src/**/*"],
-  "exclude": ["node_modules", "dist"]
+  "exclude": ["node_modules", "dist", "src/**/*.test.ts"]
 }