Simplify CI to build and test only

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     name: "IntentProof CI: Build and Test"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4
 
       - name: Checkout spec repository
         uses: actions/checkout@v4
@@ -20,28 +20,14 @@ jobs:
           ref: main
           path: intentproof-spec
 
-      - name: Ensure spec sdk-signing golden checkout
-        run: |
-          if [[ -d intentproof-spec/golden/sdk-signing ]]; then
-            exit 0
-          fi
-          git -C intentproof-spec fetch origin phase3-ecosystem-conformance
-          git -C intentproof-spec checkout FETCH_HEAD
-
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@v5
         with:
           python-version: '3.11'
 
       - name: Install dependencies
-        run: |
-          pip install -e ".[dev]"
-
-      - name: Run tests with coverage
-        env:
-          INTENTPROOF_SPEC_DIR: intentproof-spec
-        run: bash ./scripts/run-coverage-gate.sh
+        run: pip install -e ".[dev]"
 
-      - name: Verify sdk-signing fixtures synced with spec
+      - name: Run tests
         env:
           INTENTPROOF_SPEC_DIR: intentproof-spec
-        run: bash ./scripts/check-sdk-signing-fixtures-sync.sh
+        run: python3 -m pytest