chore: restore .fernignore and remove .bak files after regen

Author: GregHolmes

.fernignore

@@ -11,18 +11,16 @@ src/deepgram/client.py
 # - optional message param on control send_ methods (send_keep_alive, send_close_stream, etc.)
 #   so users don't need to instantiate the type themselves for no-payload control messages
 # [temporarily frozen — generator bugs in construct_type call convention and exception handling]
-# [REGEN: .bak copies preserved, originals unfrozen for Fern to overwrite]
-src/deepgram/agent/v1/socket_client.py.bak
-src/deepgram/listen/v1/socket_client.py.bak
-src/deepgram/listen/v2/socket_client.py.bak
-src/deepgram/speak/v1/socket_client.py.bak
+src/deepgram/agent/v1/socket_client.py
+src/deepgram/listen/v1/socket_client.py
+src/deepgram/listen/v2/socket_client.py
+src/deepgram/speak/v1/socket_client.py
 
 # Type files with manual int type corrections (Fern generates float for speaker/channel/num_words)
 # [temporarily frozen — waiting on internal-api-specs#205]
-# [REGEN: .bak copies preserved, originals unfrozen for Fern to overwrite]
-src/deepgram/types/listen_v1response_results_utterances_item.py.bak
-src/deepgram/types/listen_v1response_results_utterances_item_words_item.py.bak
-src/deepgram/types/listen_v1response_results_channels_item_alternatives_item_paragraphs_paragraphs_item.py.bak
+src/deepgram/types/listen_v1response_results_utterances_item.py
+src/deepgram/types/listen_v1response_results_utterances_item_words_item.py
+src/deepgram/types/listen_v1response_results_channels_item_alternatives_item_paragraphs_paragraphs_item.py
 
 # Hand-written custom tests
 tests/custom/test_text_builder.py