feat: add healthcheck log filter to suppress access logs for health and readiness endpoints

- Introduce `HealthcheckLogFilter` to omit unnecessary healthcheck logs.
- Apply filter to `uvicorn.access` logger during logging configuration.

Author: Pdzly

backend/app/utils/logging.py

@@ -1,10 +1,22 @@
 """Logging configuration utilities."""
 
 import logging
+import re
 import sys
 from typing import Literal
 
 
+class HealthcheckLogFilter(logging.Filter):
+    """Filter to suppress access logs for healthcheck endpoints."""
+
+    HEALTHCHECK_PATTERN = re.compile(r'"[A-Z]+\s+/(health|ready)(\?[^\s]*)?\s+HTTP/')
+
+    def filter(self, record: logging.LogRecord) -> bool:
+        """Return False to drop healthcheck logs, True to keep others."""
+        message = record.getMessage()
+        return not self.HEALTHCHECK_PATTERN.search(message)
+
+
 def configure_logging(
     level: str = "INFO",
     log_format: Literal["text", "json"] = "text",
@@ -59,6 +71,9 @@ def configure_logging(
     else:
         _configure_text_logging(numeric_level)
 
+    # Apply healthcheck log filter to uvicorn access logger
+    _configure_access_log_filter()
+
 
 def _configure_text_logging(level: int) -> None:
     """Configure standard text-based logging."""
@@ -76,3 +91,9 @@ def _configure_text_logging(level: int) -> None:
     logging.getLogger("httpx").setLevel(logging.WARNING)
     logging.getLogger("httpcore").setLevel(logging.WARNING)
     logging.getLogger("asyncio").setLevel(logging.WARNING)
+
+
+def _configure_access_log_filter() -> None:
+    """Add filter to suppress healthcheck endpoint logs from uvicorn access logs."""
+    uvicorn_access_logger = logging.getLogger("uvicorn.access")
+    uvicorn_access_logger.addFilter(HealthcheckLogFilter())