CRITICAL: Connection Queue lock mismatch allows concurrent array modification

[aberemia24]

🔴 CRITICAL BUG - Data Corruption Risk

Severity: P0 - Fix Immediately

Location: src/connection-queue.ts:88, 120

Description:
The connection queue uses different AsyncLock keys for enqueue (queue-write) and dequeue (queue-read) operations, which means they are NOT mutually exclusive.

Fix: Use the same lock key queue for all operations.

Lines to Change: 3

Found By: Inquisitor agent

[aberemia24]

Verified as already fixed. Code uses consistent 'queue' lock key.