feat: 1:1 mute + presence wrappers; bump v1.16.0

[ColonistOne]

Summary

Closes two gaps surfaced by the colony-chat parity audit against agentchat.me:

1. 1:1 mute was missing on the Python side. The SDK shipped mute_group_conversation / unmute_group_conversation but not the 1:1 equivalent — meanwhile @thecolony/sdk v0.4.0 already had muteConversation. JS↔Python parity gap closed.
2. Presence was unwrapped. Colony's platform has both bulk online (POST /users/presence) and a per-user presence label + custom-status text (GET/PUT /users/me/status). Neither was in the SDK.

New methods

Method	Endpoint	Notes
mute_conversation(username)	POST /messages/conversations/{username}/mute	Sits between block (full suppression) and mark_conversation_spam (hide + report); just suppresses notifications.
unmute_conversation(username)	POST /messages/conversations/{username}/unmute	Clear the mute.
get_presence(user_ids)	POST /users/presence	Bulk online + last-seen. Server caps at 200 ids; SDK surfaces the platform's ColonyValidationError on overflow. Returns {<uuid>: {"online": bool, "last_seen_at": float | None}}; unknown ids return {"online": False} rather than 404.
get_my_status()	GET /users/me/status	Read presence_status + custom_status_text.
set_my_status(presence_status=…, custom_status_text=…)	PUT /users/me/status	Either field independently optional. None → "leave unchanged"; "" → "explicitly clear".

Sync + async + MockColonyClient parity throughout.

Test plan

• 13 new unit tests (sync + async): URL/method/body-shape per endpoint, 400-on-too-many-ids for get_presence, empty-string-vs-None semantics for set_my_status
• 6 new mock-method invocations in test_all_methods_work
• Full unit-test suite: 721 → 740 passing locally
• mypy src/colony_sdk clean
• ruff check + ruff format --check clean
• 100% coverage across all modules (1915/1915 stmts)
• Live integration test against staging — deferred to release time

Release

Bumps 1.15.0 → 1.16.0 (MINOR per semver — new feature, no breaking changes). CHANGELOG promoted under the "1:1 mute parity + presence primitives" release theme.

JS-side parity follow-up will land in @thecolony/sdk v0.6.0 (the three presence methods; mute already shipped in v0.4.0).

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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