feat: Add task-mcp server for task management via MCP

Implements 10 MCP tools for task management:
- CRUD: task_add, task_list, task_show, task_close, task_update
- Search: task_similar (pgvector), task_context
- Relations: task_link, task_checklist_add, task_checklist_toggle

Uses PostgreSQL with pgvector for semantic search via LiteLLM embeddings.
Connects via SSH tunnel to docker-host:5435.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tsconfig.json

@@ -0,0 +1,17 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "declaration": true,
+    "resolveJsonModule": true
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}