ci: upgrade to ironclad CI/CD configuration

- Upgrade setup-uv@v4 → v7 with built-in caching (removes cache warning)
- Pin uv version to 0.5.6 for reproducible builds
- Add ruff format --check (enforces consistent formatting)
- Add --locked to uv sync (ensures lockfile integrity)
- Auto-format 4 files to pass new format check

.github/workflows/ci.yml

@@ -13,28 +13,25 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Cache uv packages
-        uses: actions/cache@v4
-        with:
-          path: ~/.cache/uv
-          key: ${{ runner.os }}-uv-${{ hashFiles('**/pyproject.toml') }}
-          restore-keys: |
-            ${{ runner.os }}-uv-
-
       - name: Install uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v7
         with:
-          version: "latest"
+          version: "0.5.6"
+          enable-cache: true
+          cache-dependency-glob: "uv.lock"
 
       - name: Set up Python 3.11
         run: uv python install 3.11
 
       - name: Install dependencies
-        run: uv sync --all-extras
+        run: uv sync --all-extras --locked
 
       - name: Lint with ruff
         run: uv run ruff check src tests
 
+      - name: Format check with ruff
+        run: uv run ruff format --check src tests
+
       - name: Type check with mypy
         run: uv run mypy src
 

src/services/embedding_protocol.py

@@ -74,9 +74,7 @@ class EmbeddingServiceProtocol(Protocol):
         """
         ...
 
-    async def add_evidence(
-        self, evidence_id: str, content: str, metadata: dict[str, Any]
-    ) -> None:
+    async def add_evidence(self, evidence_id: str, content: str, metadata: dict[str, Any]) -> None:
         """Store evidence with embeddings.
 
         Args:
@@ -87,9 +85,7 @@ class EmbeddingServiceProtocol(Protocol):
         """
         ...
 
-    async def search_similar(
-        self, query: str, n_results: int = 5
-    ) -> list[dict[str, Any]]:
+    async def search_similar(self, query: str, n_results: int = 5) -> list[dict[str, Any]]:
         """Search for semantically similar content.
 
         Args:

tests/unit/services/test_service_loader.py

@@ -60,6 +60,7 @@ class TestGetEmbeddingService:
 
             # Make llamaindex_rag module raise ImportError on import
             import sys
+
             original_modules = dict(sys.modules)
 
             # Remove llamaindex_rag if it exists
@@ -68,9 +69,7 @@ class TestGetEmbeddingService:
 
             try:
                 # Patch to raise ImportError
-                mock_embed_module = MagicMock(
-                    get_embedding_service=lambda: mock_local_service
-                )
+                mock_embed_module = MagicMock(get_embedding_service=lambda: mock_local_service)
                 with patch.dict(
                     "sys.modules",
                     {