- Hoist the cell-strip patterns to module level so they match the rest of
the module's regex style and aren't reparsed on every call.
- Type the markdown transform callback and the mention id walker so the
inline Callable signature is no longer an untyped Any.
- Add _HTTP_TIMEOUT_SECONDS alongside the other class-level tunables.
- Reject group_message_buffer_size <= 0 in a Pydantic field_validator
rather than silently disabling the buffer at write time.
- Mark SignalConfig.allow_from as a computed_field so it shows up in
model_dump() instead of being invisible to serialization.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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