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>

package.json

@@ -0,0 +1,23 @@
+{
+  "name": "task-mcp",
+  "version": "1.0.0",
+  "description": "MCP server for task management with PostgreSQL/pgvector backend",
+  "main": "dist/index.js",
+  "type": "module",
+  "scripts": {
+    "build": "tsc",
+    "start": "node dist/index.js",
+    "dev": "tsx src/index.ts",
+    "clean": "rm -rf dist"
+  },
+  "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.0.4",
+    "pg": "^8.11.3"
+  },
+  "devDependencies": {
+    "@types/node": "^20.11.0",
+    "@types/pg": "^8.10.9",
+    "typescript": "^5.3.3",
+    "tsx": "^4.7.0"
+  }
+}