feat: Phase 2 (fragment migration), Phase 3 (testing infrastructure), Phase 4 (CI/CD)

Phase 2: Fragment Migration
- Migrated 42 ingredients to 54 fine-grained fragments
- Replaced %include with %ksappend syntax
- Created organized fragment structure (platform/generic-43, platform/generic-rawhide, shared/)
- Updated generator to use fragment paths
- All 16 manifest variants generate successfully

Phase 3: Testing Infrastructure
- Created containerized test runner (tests/container/)
- Added integration test suite (tests/integration/)
- Created golden master fixtures (tests/fixtures/expected_recipes/)
- 41 tests passing (36 unit + 5 integration)
- 54 fragments, 16 recipes validated

Phase 4: CI/CD Integration
- 5 new workflows: validate-recipes, validate-fragments, test-generation, container-tests, build-iso
- Added validation gates before ISO builds
- Works with existing fedora-runner-image
- Local testing support via act_runner

tests/container/run-tests.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+# Run all tests inside the container environment
+# Usage: podman run --rm -v .:/phyllomeos:ro phyllo/test-runner
+
+set -e
+
+echo "============================================="
+echo "  Phyllome OS Recipe Generator Test Suite"
+echo "============================================="
+echo ""
+
+# Navigate to project root
+cd /phyllomeos
+
+echo "[1/3] Running unit tests (test_recipe_generator.py)..."
+echo "----------------------------------------"
+python3 -m pytest tests/test_recipe_generator.py -v
+echo "✓ Unit tests passed!"
+echo ""
+
+echo "[2/3] Running integration tests..."
+echo "----------------------------------------"
+python3 -m pytest tests/integration/ -v
+echo "✓ Integration tests passed!"
+echo ""
+
+echo "[3/3] Validating generated recipes..."
+echo "----------------------------------------"
+cd scripts
+python3 generate_recipe.py --validate ../recipes/*.cfg --strict
+echo "✓ Recipe validation passed!"
+echo ""
+
+echo "============================================="
+echo "  ALL TESTS PASSED!"
+echo "============================================="
+echo ""
+echo "Summary:"
+echo "  - Unit tests: 36 tests (test_recipe_generator.py)"
+echo "  - Integration tests: Fragment validation, recipe composition, golden masters"
+echo "  - Fragment validation: 54 .ks files checked"
+echo "  - Recipe validation: All 16 manifest variants generated and validated"
+echo ""