Previously _send_text() caught all exceptions (except Exception) when
sending HTML-formatted messages, falling back to plain text even for
network errors like TimedOut and NetworkError. This caused connection
demand to double during pool exhaustion scenarios (3 retries × 2
fallback attempts = 6 calls per message instead of 3).
Now only catches BadRequest (HTML parse errors), letting network errors
propagate immediately to the retry layer where they belong.
Fixes: HKUDS/nanobot#3050
Forward static location pins as [location: lat, lon] content so the
agent can respond to geo messages and pass coordinates to MCP tools.
ClosesHKUDS/nanobot#2909
Use dream_log and dream_restore in Telegram's bot command menu so command registration succeeds, while still accepting the original dream-log and dream-restore forms in chat. Keep the internal command routing unchanged and add coverage for the alias normalization path.
Make channel delivery failures raise consistently so retry policy lives in ChannelManager rather than being split across individual channels. Tighten Telegram stream finalization, clarify sendMaxRetries semantics, and align the docs with the behavior the system actually guarantees.
