docs(core): document session title generation
Document the new `[session_titles]` settings and clarify the thread-title generation internals with focused rustdoc comments. This explains how generated names interact with `/rename`, when the background request is allowed to run, and why generated title values are sanitized before being persisted.
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Felipe Coury committed
1ae11eb3465abd299cb3d48e63da5318e62317f0
Parent: e4e44fc