chore: reduce healthcheck interval to 1h to minimize log noise

Healthcheck now runs once per hour instead of every 30 seconds,
reducing log spam while still maintaining startup verification
during the 40s start_period.

Benefits:
- Minimal log noise (1 check/hour vs every 30s)
- Maintains startup verification
- Compatible with Docker orchestration tools

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+- Reduced Docker healthcheck frequency from 30s to 1h to minimize log noise while maintaining startup verification
+
 ## [0.3.1] - 2025-11-03
 
 ### Fixed