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/integrations/onlyoffice_nextcloud.go

@@ -14,6 +14,7 @@ type OnlyOfficeNextcloudHandler struct{}
 func (h *OnlyOfficeNextcloudHandler) Apply(ac *ApplyContext) error {
 	jwtSecret := ac.ProviderEnv["JWT_SECRET"]
 	if jwtSecret == "" {
+		ac.Logger.Printf("[ERROR] [integrations] OnlyOffice-Nextcloud apply: JWT_SECRET not set")
 		return fmt.Errorf("OnlyOffice JWT_SECRET nincs beállítva")
 	}
 
@@ -22,6 +23,7 @@ func (h *OnlyOfficeNextcloudHandler) Apply(ac *ApplyContext) error {
 		subdomain = ac.ProviderMeta.Subdomain
 	}
 	if subdomain == "" {
+		ac.Logger.Printf("[ERROR] [integrations] OnlyOffice-Nextcloud apply: subdomain unknown")
 		return fmt.Errorf("OnlyOffice aldomain nem ismert")
 	}
 
@@ -72,6 +74,7 @@ func (h *OnlyOfficeNextcloudHandler) Apply(ac *ApplyContext) error {
 				ac.Logger.Printf("[DEBUG] Nextcloud occ: tolerated — %s", strings.TrimSpace(string(out)))
 				continue
 			}
+			ac.Logger.Printf("[ERROR] [integrations] OnlyOffice-Nextcloud apply: occ %s failed: %v", cmd.args[len(cmd.args)-1], err)
 			return fmt.Errorf("occ parancs sikertelen (%s): %v (kimenet: %s)", cmd.args[len(cmd.args)-1], err, strings.TrimSpace(string(out)))
 		}
 		ac.Logger.Printf("[DEBUG] Nextcloud occ %s: ok", strings.Join(cmd.args[7:], " "))
@@ -96,6 +99,7 @@ func (h *OnlyOfficeNextcloudHandler) Revoke(ac *ApplyContext) error {
 			ac.Logger.Printf("[DEBUG] Nextcloud occ app:disable skipped — %s", strings.TrimSpace(outStr))
 			return nil
 		}
+		ac.Logger.Printf("[ERROR] [integrations] OnlyOffice-Nextcloud revoke: occ app:disable failed: %v", err)
 		return fmt.Errorf("occ app:disable sikertelen: %v (kimenet: %s)", err, strings.TrimSpace(outStr))
 	}