Phase 8: Add error handling polish

- Dry-run continues even without API access
- Shows planned operations from metadata alone
- Better health check handling for offline testing

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

outline_import.py

@@ -690,14 +690,20 @@ class OutlineImporter:
             print("[DRY RUN] No changes will be made")
             print()
 
-        # Health check
+        # Health check (skip in dry-run mode if it fails)
-        if not self.health_check():
+        health_ok = self.health_check()
+        if not health_ok:
+            if self.dry_run:
+                print("  (continuing in dry-run mode without API)")
+                print()
+            else:
                 logger.error("Import aborted due to failed health check")
                 return
-
+        else:
             print()
 
-        # Get existing collections
+        # Get existing collections (skip in dry-run if health check failed)
+        if health_ok:
             self._get_collections()
 
         # Get source collections