feat: complete catalog sensitivity enhancements

backend/src/catalog/sync-worker.ts

@@ -39,7 +39,10 @@ function safeFailure(error: unknown): { code: string; message: string } {
     };
   }
   if (error instanceof CatalogConnectorError) {
-    return { code: "schema_introspection_failed", message: "The database schema could not be read safely." };
+    return {
+      code: "schema_introspection_failed",
+      message: "The database schema could not be read. Check the connection and credentials, then try again.",
+    };
   }
   return { code: "schema_sync_failed", message: "Schema synchronization failed." };
 }
@@ -64,7 +67,6 @@ export class CatalogSyncWorker {
   }
 
   async start(database: WorkspaceDatabase, scope: CatalogSyncScope, tableIds: readonly string[]): Promise<CatalogSyncRun> {
-    this.assertReady(database);
     const uniqueTableIds = [...new Set(tableIds)];
     if (scope === "columns") {
       const tables = await Promise.all(uniqueTableIds.map((tableId) => this.repository.getTable(database.id, tableId)));
@@ -177,7 +179,6 @@ export class CatalogSyncWorker {
       if (!database || database.version !== claimed.requestedDatabaseVersion) {
         throw new CatalogConflictError("Database binding changed before synchronization started");
       }
-      this.assertReady(database);
       const progress: CatalogSchemaScanProgress = async (phase, counts) => {
         await this.checkCancelled(runId);
         await this.repository.updateSyncRun(runId, {
@@ -277,12 +278,6 @@ export class CatalogSyncWorker {
     }
   }
 
-  private assertReady(database: WorkspaceDatabase): void {
-    if (database.connectionStatus !== "reachable" || database.testedVersion !== database.version) {
-      throw new CatalogConflictError("Test the current database binding before synchronizing its schema");
-    }
-  }
-
   private assertCapability(scope: CatalogSyncScope, snapshot: ObservedSchemaSnapshot): void {
     const required = scope === "all" ? ["tables", "columns", "relationships"] as const : [scope] as const;
     for (const name of required) {