993c6eb469
The 3000 ms timeout on /v1/compress was fixed, so busy or slow machines timed out often and sent the LLM an inconsistently compressed body, hurting prompt caching. Add a headroomTimeoutMs setting, thread it from the chat handler down to compressWithHeadroom, expose it in the Token Saver dashboard, and normalize invalid values back to the 3000 ms default.