feat: Add MCP server stubs, development docs, and Docker updates

- Add MCP server skeleton implementations for all 7 planned servers
  (llm-gateway, knowledge-base, git, issues, filesystem, code-analysis, cicd)
- Add comprehensive DEVELOPMENT.md with setup and usage instructions
- Add BACKLOG.md with detailed phase planning
- Update docker-compose.dev.yml with Redis and Celery workers
- Update CLAUDE.md with Syndarix-specific context

Addresses issues #16, #20, #21

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

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

mcp-servers/filesystem/server.py

@@ -0,0 +1,47 @@
+"""
+Syndarix Filesystem MCP Server.
+
+Provides sandboxed file operations with:
+- Project-scoped file access
+- Read/write/delete operations
+- Directory listing
+
+Phase 5 implementation.
+"""
+
+import os
+
+from fastmcp import FastMCP
+
+mcp = FastMCP(
+    "syndarix-filesystem",
+    description="Sandboxed file operations",
+)
+
+
+@mcp.tool()
+async def read_file(project_id: str, path: str) -> dict:
+    """Read a file from the project workspace."""
+    return {"status": "not_implemented", "project_id": project_id}
+
+
+@mcp.tool()
+async def write_file(project_id: str, path: str, content: str) -> dict:
+    """Write content to a file in the project workspace."""
+    return {"status": "not_implemented", "project_id": project_id}
+
+
+@mcp.tool()
+async def list_directory(project_id: str, path: str = ".") -> dict:
+    """List contents of a directory."""
+    return {"status": "not_implemented", "project_id": project_id}
+
+
+@mcp.tool()
+async def delete_file(project_id: str, path: str) -> dict:
+    """Delete a file from the project workspace."""
+    return {"status": "not_implemented", "project_id": project_id}
+
+
+if __name__ == "__main__":
+    mcp.run()