feat: restore WORKSPACE_ROOT, add fastmcp server (App over SQLiteStore)

pyproject.toml

@@ -7,7 +7,9 @@ authors = [
     { name = "lda", email = "[email protected]" }
 ]
 requires-python = ">=3.14"
-dependencies = []
+dependencies = [
+    "fastmcp>=4.0.0",
+]
 
 [tool.uv]
 package = true