cli[patch]: Ignore imports that change the name of the class (#21026)

Not currently handeled by migration script

libs/cli/langchain_cli/namespaces/migrate/codemods/migrations/langchain_to_core.json

@@ -2123,4 +2123,4 @@
     "langchain.vectorstores.singlestoredb.SingleStoreDBRetriever",
     "langchain_core.vectorstores.VectorStoreRetriever"
   ]
-]
+]

libs/cli/langchain_cli/namespaces/migrate/codemods/replace_imports.py

@@ -29,7 +29,17 @@ def _load_migrations_by_file(path: str):
     migrations_path = os.path.join(HERE, "migrations", path)
     with open(migrations_path, "r", encoding="utf-8") as f:
         data = json.load(f)
-    return data
+
+    # new migrations
+    new_migrations = []
+    for migration in data:
+        old = migration[0].split(".")[-1]
+        new = migration[1].split(".")[-1]
+
+        if old == new:
+            new_migrations.append(migration)
+
+    return new_migrations
 
 
 T = TypeVar("T")