fix(translator): preserve prompt_cache_key when translating Responses API requests
(#517) — prompt_cache_key is an account-affinity signal used by Codex for
prompt cache routing. Deleting it from the translated request prevented full
cache effectiveness. Removed delete from openai-responses.ts and
responsesApiHelper.ts cleanup blocks.
fix(combo): escape \n in tagContent so injected JSON string is valid (#515)
— omniModel tag content used template literal newlines (U+000A) which produce
unescaped newline chars inside a JSON string value. Replaced with literal \n
escape sequences for valid JSON injection in streaming SSE content chunks.
8b556de03b