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/package.json

@@ -11,10 +11,12 @@
   "dependencies": {
     "@anthropic-ai/claude-agent-sdk": "^0.2.92",
     "@modelcontextprotocol/sdk": "^1.12.1",
+    "better-sqlite3": "^11.10.0",
     "cron-parser": "^5.0.0",
     "zod": "^4.0.0"
   },
   "devDependencies": {
+    "@types/better-sqlite3": "^7.6.12",
     "@types/node": "^22.10.7",
     "typescript": "^5.7.3"
   }

container/agent-runner/tsconfig.json

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