ci: enhance GitHub Actions workflow

.github/workflows/test.yml

@@ -4,11 +4,13 @@ on:
   push:
     branches: [main]
   pull_request:
+  workflow_dispatch:  # Allow manual runs
 
 jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false  # Run all matrix combinations even if one fails
       matrix:
         python-version: ['3.10', '3.11', '3.12']
 
@@ -19,6 +21,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+          cache: 'pip'
 
       - name: Install dependencies
         run: |
@@ -27,7 +30,7 @@ jobs:
 
       - name: Run tests with coverage
         run: |
-          pytest tests/ -v --cov=src/document_analysis_mcp --cov-report=term --cov-report=xml
+          pytest tests/ -v --cov=src/document_analysis_mcp --cov-report=term --cov-report=xml --cov-fail-under=80
 
       - name: Upload coverage to Codecov
         if: matrix.python-version == '3.12'
@@ -38,13 +41,16 @@ jobs:
 
   lint:
     runs-on: ubuntu-latest
+    # Lint is non-blocking - failures are reported but don't fail the build
+    continue-on-error: true
     steps:
       - uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
           python-version: '3.12'
+          cache: 'pip'
 
       - name: Install ruff
         run: pip install ruff