test: Skip tests requiring optional dependencies

- Skip test_benchmark.py if psutil not installed
- Skip test_embedding.py if numpy not installed
- Skip test_embedding_pipeline.py if numpy not installed
- Uses pytest.importorskip() for clean dependency handling
- Fixes CI test collection errors for optional features

tests/test_benchmark.py

@@ -2,10 +2,13 @@
 Tests for benchmarking suite.
 """
 
+import pytest
 import time
 import json
 from datetime import datetime
 
+# Skip all tests if psutil is not installed
+pytest.importorskip("psutil")
 
 from skill_seekers.benchmark import (
     Benchmark,

tests/test_embedding.py

@@ -7,6 +7,9 @@ import tempfile
 from pathlib import Path
 from unittest.mock import patch
 
+# Skip all tests if numpy is not installed
+pytest.importorskip("numpy")
+
 from skill_seekers.embedding.models import (
     EmbeddingRequest,
     BatchEmbeddingRequest,

tests/test_embedding_pipeline.py

@@ -15,6 +15,9 @@ from pathlib import Path
 import sys
 import tempfile
 
+# Skip all tests if numpy is not installed
+pytest.importorskip("numpy")
+
 # Add src to path
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))