ci(test): split into unit (no DB) and integration (postgres) jobs

.gitea/workflows/test.yml

@@ -6,9 +6,25 @@ on:
   pull_request:
 
 jobs:
-  test:
+  # Unit tests — no database required.
+  # All business logic is tested via TestStore (in-memory port implementations).
+  unit:
     runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+      - name: unit tests
+        run: |
+          cargo test --workspace \
+            --exclude postgres \
+            --exclude postgres-federation \
+            --exclude postgres-search
 
+  # Integration tests — require a real PostgreSQL instance.
+  # These test that the SQL queries in the adapter crates are correct.
+  integration:
+    runs-on: ubuntu-latest
     services:
       postgres:
         image: postgres:16
@@ -22,16 +38,15 @@ jobs:
           --health-retries 5
         ports:
           - 5432:5432
-
     env:
       DATABASE_URL: postgres://postgres:postgres@localhost:5432/thoughts_test
-
     steps:
       - uses: actions/checkout@v4
-
       - uses: dtolnay/rust-toolchain@stable
-
       - uses: Swatinem/rust-cache@v2
-
-      - name: test
-        run: cargo test --workspace
+      - name: integration tests
+        run: |
+          cargo test \
+            -p postgres \
+            -p postgres-federation \
+            -p postgres-search