fix(gateway): preserve Telegram DM context after restart

[ghost]

Summary

• skip startup synthetic auto-resume for real Telegram DMs so Enoch waits for actual inbound text
• inject recent local Telegram DM transcript for explicit read-chat requests
• persist the clean user text when API-only context is prepended

Validation

• python -m py_compile gateway/run.py tests/gateway/test_restart_resume_pending.py
• pytest tests/gateway/test_restart_resume_pending.py -q (69 passed)
• pytest tests/gateway/test_auto_continue.py -q (6 passed)
• git diff --check --cached

[alt-glitch]

Likely overlaps with #30030 (harden restart resume recovery — also preserves Telegram DM topic anchor, skips stale auto-resumes). Also related to merged #28488 (DM topic routing on resumed events). Please coordinate to avoid redundant work.

[ghost]

Superseded by the golden overlay path per repo policy: https://github.com/enochosbot-bot/hermes-golden/pull/94. We keep Hermes updates underneath and reapply this behavior from hermes-golden rather than merging it directly into upstream hermes-agent.