Add HTTP health endpoint on /health and /api/mirror-health

- New axum-based health server on port 7335 (configurable via health_port)
- Reports status, uptime, cycle_count, last_cycle_ok as JSON
- Status is 'ok' on startup and after successful cycles, 'degraded' after failures
- Config: storage.health_port defaults to 7335
- Spawned alongside daemon loop, independent of mirror cycles

1 files changed, 6 insertions, 0 deletions

diff --git a/src/config.rs b/src/config.rs
index ceff44d..037deb2 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -33,6 +33,12 @@ pub struct StorageConfig {
     pub mirror_dir: PathBuf,
     #[serde(default = "default_database")]
     pub database: PathBuf,
+    #[serde(default = "default_health_port")]
+    pub health_port: u16,
+}
+
+fn default_health_port() -> u16 {
+    7335
 }
 
 fn default_mirror_dir() -> PathBuf {