## Changes
### 1. Fix client.start() hanging forever (shared.ts)
The bot-sdk's `client.start()` returns a promise that never resolves
(infinite sync loop). The plugin awaited it, blocking the entire provider
startup — `logged in as` never printed, no messages were processed.
Fix: fire-and-forget with error handler + 2s initialization delay.
### 2. Fix DM false positive for 2-member rooms (direct.ts)
`memberCount === 2` heuristic misclassified explicitly configured group
rooms as DMs when only bot + one user were joined. Messages were routed
through DM policy and silently dropped.
Fix: remove member count heuristic; only trust `m.direct` account data
and `is_direct` room state flag.
Ref: #20145
### 3. Prevent duplicate event listener registration (events.ts)
When both bundled channel plugin and extension load, listeners were
registered twice on the same shared client, causing inconsistent state.
Fix: WeakSet guard to skip registration if client already has listeners.
Ref: #18330
### 4. Add startup grace period (index.ts)
`startupGraceMs = 0` dropped messages timestamped during async setup.
Especially problematic with Conduit which retries on `M_NOT_FOUND`
during filter creation.
Fix: 5-second grace period.
### 5. Fix room ID case sensitivity with Conduit (index.ts)
Room IDs (`!xyz`) without `:server` suffix failed the
`includes(':')` check and were sent to `resolveMatrixTargets`, which
called Conduit's `resolveRoom` — returning lowercased IDs. The bot-sdk
emits events with original-case IDs, causing config lookup mismatches
and reply delivery failures (`M_UNKNOWN: non-create event for room of
unknown version`).
Fix: treat `!`-prefixed entries as room IDs directly (skip resolution).
Only resolve `#alias:server` entries.
## Testing
Tested with Conduit homeserver (lightweight Rust Matrix server).
All fixes verified with gateway log tracing:
- `logged in as @arvi:matrix.local` — first successful login
- `room.message` events fire and reach handler
- Room config matching returns `allowed: true`
- Agent generates response and delivers it to Matrix room
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