Add pharmacy auto-registration and infrastructure improvements

- Auto-generate pharmacy_code (P001~P999) when creating new pharmacy
- Add new pharmacy fields: owner info, institution code/type, API port
- Change Headplane port mapping: 3000 → 3001 to avoid conflicts
- Add code-server setup script for development environment
- Add LXC Caddy setup documentation
- Update .gitignore to exclude farmq-admin submodule

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.gitignore

@@ -158,4 +158,7 @@ venv.bak/
 dmypy.json
 
 # Pyre type checker
-.pyre/
+.pyre/
+
+# Submodules managed separately
+farmq-admin/