feat: add structlog logging configuration

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_logging.py

@@ -0,0 +1,22 @@
+"""Tests for structured logging configuration."""
+
+import structlog
+
+from app.logging_config import setup_logging
+
+
+class TestLogging:
+    """Tests for the structlog configuration."""
+
+    def test_setup_logging_configures_structlog(self) -> None:
+        """setup_logging should configure structlog without errors."""
+        setup_logging(log_level="info")
+        logger = structlog.get_logger("test")
+        assert logger is not None
+
+    def test_logger_can_log_message(self) -> None:
+        """A configured logger should be able to emit a log message."""
+        setup_logging(log_level="debug")
+        logger = structlog.get_logger("test_module")
+        # Should not raise
+        logger.info("test message", key="value")