fix(misc): complete parking_lot::Mutex migration (fixes#505)
- DiscordChannel: store actual channel_id in ChannelMessage.channel
instead of hardcoded "discord" string
- channels/mod.rs: use msg.channel instead of msg.sender for replies
- Migrate all std::sync::Mutex to parking_lot::Mutex:
* src/security/audit.rs
* src/memory/sqlite.rs
* src/memory/response_cache.rs
* src/memory/lucid.rs
* src/channels/email_channel.rs
* src/gateway/mod.rs
* src/observability/traits.rs
* src/providers/reliable.rs
* src/providers/router.rs
* src/agent/agent.rs
- Remove all .lock().unwrap() and .map_err(PoisonError) patterns
since parking_lot::Mutex never poisons
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Fixes#430 - Prevents duplicate memories after restart by using platform message IDs instead of random UUIDs.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>