feat: initial corvid — standalone ticket service extracted from homelab-dashboard

Extracts the ticket/attachment system into a reusable pip-installable package.
Centralises homelab MCP server (tickets, attachments, system logs) here.

- corvid package: models, router (make_router factory), config, standalone main
- Alembic migration chain for fresh standalone deployments
- Docker Compose for standalone deployment (port 8090)
- mcp_server.py: moved from homelab-dashboard, CORVID_REPO_PATH configurable

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

corvid.egg-info/requires.txt

@@ -0,0 +1,15 @@
+fastapi>=0.115
+sqlalchemy[asyncio]>=2.0
+asyncpg>=0.30
+uvicorn[standard]>=0.32
+alembic>=1.14
+pydantic>=2.0
+
+[dev]
+pytest>=8.0
+pytest-asyncio>=0.24
+aiosqlite>=0.20
+
+[mcp]
+mcp[cli]>=1.0
+httpx>=0.28