fix(sync): honour readiness and suspension in Customisation Sync

(src/features/ConfigSync/CmdConfigSync.ts)
- Call the readiness predicate before accepting configuration file events.
- Stop the periodic sweep while settings are applied and let the resume lifecycle scan and restart it once.

(src/features/ConfigSync/CmdConfigSync.applySettings.unit.spec.ts)
- Exercise the ControlService settings path while active, suspended, and resumed.
- Verify that suspended settings application performs no scan and leaves the periodic sweep stopped.

(src/features/ConfigSync/CmdConfigSync.readiness.unit.spec.ts)
- Cover configuration file events before and after application readiness.

(updates.md)
- Document the readiness and suspension behaviour.

src/features/ConfigSync/CmdConfigSync.ts

@@ -1198,20 +1198,11 @@ export class ConfigSync extends LiveSyncCommands {
         }
         return true;
     }
-    async _everyRealizeSettingSyncMode(): Promise<boolean> {
+    _everyRealizeSettingSyncMode(): Promise<boolean> {
+        // applySettings calls onResuming after this handler when synchronisation is active.
+        // That handler scans and restarts the sweep; doing so here would scan twice.
         this.periodicPluginSweepProcessor?.disable();
-        if (!this._isMainReady) return true;
-        if (!this._isMainSuspended()) return true;
-        if (!this.isThisModuleEnabled()) return true;
-        if (this.settings.autoSweepPlugins) {
-            await this.scanAllConfigFiles(false);
-        }
-        this.periodicPluginSweepProcessor.enable(
-            this.settings.autoSweepPluginsPeriodic && !this.settings.watchInternalFileChanges
-                ? PERIODIC_PLUGIN_SWEEP * 1000
-                : 0
-        );
-        return true;
+        return Promise.resolve(true);
     }
 
     recentProcessedInternalFiles = [] as string[];
@@ -1488,7 +1479,7 @@ export class ConfigSync extends LiveSyncCommands {
     }
 
     async watchVaultRawEventsAsync(path: FilePath) {
-        if (!this._isMainReady) return false;
+        if (!this._isMainReady()) return false;
         if (this._isMainSuspended()) return false;
         if (!this.isThisModuleEnabled()) return false;
         // if (!this.isTargetPath(path)) return false;