feat: comprehensive INFO/WARN/ERROR logging across all controller modules

Add structured operational logging at INFO, WARN, and ERROR levels to
every controller module. Standardize custom prefixes ([GEO], [SCHED],
[SYNC]) to use [INFO/WARN/ERROR] [module] format. Fix misleveled logs
(WARN->ERROR for data loss scenarios, WARN->INFO for routine operations).

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

controller/internal/appexport/restore.go

@@ -218,6 +218,7 @@ func (e *Exporter) StartImport(req ImportRequest) error {
 
 func (e *Exporter) executeImport(req ImportRequest, job *Job) {
 	importStart := time.Now()
+	e.logger.Printf("[INFO] [appexport] Import started for %s", filepath.Base(req.FABPath))
 	e.debugf("=== IMPORT START: path=%s encrypted=%v ===", req.FABPath, req.Password != "")
 
 	defer func() {