fix: invoke LogPanicCallback in panicCatchingEpochHook to actually log recovered panics

[CertiK-Geth]

Description

Previously the panic callback was created but never invoked, so recovered panics were not logged.
Invoke the returned function to ensure the recovered error and stack trace are logged for observability.

Changes

// ...existing code...
func panicCatchingEpochHook(ctx sdk.Context, hookFn func(sdk.Context, Epoch), epoch Epoch) {
-	defer utils.PanicHandler(func(r any) {
-		utils.LogPanicCallback(ctx, r)
-	})()
+	defer utils.PanicHandler(func(r any) {
+		// LogPanicCallback returns a func(any); invoke it so the panic is actually logged.
+		utils.LogPanicCallback(ctx, r)(r)
+	})()
 
     // cache the context and only write if no panic (which is caught above)
     cacheCtx, write := ctx.CacheContext()
     hookFn(cacheCtx, epoch)
     write()
 }
 // ...existing