fix: sync Telegram topic titles with /title

[a5r0n]

Summary

• rename Telegram topic threads when /title is used inside a Telegram topic
• support Telegram's separate general-topic rename API and cache topic-title changes
• add gateway and adapter tests covering thread renames and topic service updates

Test Plan

• source venv/bin/activate && pytest -q tests/gateway/test_title_command.py tests/gateway/test_dm_topics.py

[alt-glitch]

Overlaps significantly with #9921 (auto-rename forum topics on session title change) — maintainers should decide which to merge.

[a5r0n]

Update: I expanded tests to improve coverage around the refactored native title-sync flow.

Added coverage for:

• title-generator error and persistence-failure paths
• post-delivery callback composition and generation-filter behavior
• Telegram topic-title guard/early-return paths and cached topic-name propagation
• gateway title-sync helper fallbacks and auto-title scheduling helpers
• set_session_title_if_missing empty-title rejection

Validation run:

source venv/bin/activate && pytest -q tests/agent/test_title_generator.py tests/gateway/test_dm_topics.py tests/gateway/test_run_progress_topics.py tests/gateway/test_title_command.py tests/test_hermes_state.py

Result: 269 passed

Coverage check on the refactored area:

source venv/bin/activate && coverage run -m pytest -o addopts="" -q tests/gateway/test_title_command.py tests/agent/test_title_generator.py tests/gateway/test_dm_topics.py tests/gateway/test_run_progress_topics.py tests/test_hermes_state.py && coverage report -m agent/title_generator.py gateway/platforms/base.py gateway/platforms/telegram.py gateway/run.py hermes_state.py

Changed-line coverage now looks strong for the new code:

• agent/title_generator.py: 100%
• gateway/platforms/base.py: 98.2%
• gateway/platforms/telegram.py: 99.0%
• gateway/run.py: 92.7%
• hermes_state.py: 100%

[kshitijk4poor]

Closing the /title → Telegram topic-rename portion of this as a duplicate of #49172, salvaged into #49245 (merging now) — it reuses the existing _schedule_telegram_topic_title_rename helper rather than reimplementing the rename machinery, with tests for both the rename and no-rename-on-show paths.

Your PR also carries broader scope (title-sync beyond the manual /title command). If that wider piece is still wanted, a focused follow-up PR scoped to just that extra behavior would be welcome — the core /title gap is now covered on main.

Thanks for the contribution; credited in the merged PR.

#49245