Fix dify-builder contract gen script cwd and stale docstring paths

uv run --project selects the venv but doesn't chdir, so invoking
gen-dify-builder-contract from packages/contracts (as autofix.yml does)
raised ModuleNotFoundError: No module named 'core'. Switch to
--directory so uv chdirs into api/ before running the module. Also
update two contract_gen.py docstrings that still pointed at the old
web/app/components/dify-builder/contract/types.ts output path.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

api/core/dify_builder/contract_gen.py

@@ -9,7 +9,7 @@ Regenerate after any change to those sources::
 This writes the two checked-in derived files:
 
 - ``api/core/dify_builder/contract_schema.json``
-- ``web/app/components/dify-builder/contract/types.ts``
+- ``packages/contracts/generated/dify-builder/types.ts``
 
 Both are DERIVED -- never hand-edit them. ``tests/unit_tests/core/
 dify_builder/test_contract.py::test_schema_in_lockstep`` byte-compares a
@@ -238,7 +238,7 @@ def generate() -> tuple[dict[str, Any], str]:
 
 
 def main() -> None:
-    """Write ``contract_schema.json`` + ``web/.../contract/types.ts`` to disk."""
+    """Write ``contract_schema.json`` + ``packages/contracts/generated/dify-builder/types.ts`` to disk."""
     schema, ts_source = generate()
 
     repo_root = next(p for p in Path(__file__).parents if (p / "web").is_dir() and (p / "api").is_dir())

packages/contracts/package.json

@@ -38,7 +38,7 @@
     "gen-enterprise-contract": "openapi-ts -f openapi-ts.enterprise.config.ts",
     "gen-enterprise-app-deploy-contract": "openapi-ts -f openapi-ts.enterprise-app-deploy.config.ts",
     "gen-knowledge-fs-contract": "node scripts/generate-knowledge-fs-contract.mjs",
-    "gen-dify-builder-contract": "uv run --project ../../api python -m core.dify_builder.contract_gen",
+    "gen-dify-builder-contract": "uv run --directory ../../api python -m core.dify_builder.contract_gen",
     "test": "vp test",
     "type-check": "tsc"
   },