Move registerEventHandlers() call before the readLoop goroutine starts
in connectAndRun(). This eliminates the startup window where live gateway
events were actively read and dropped as 'unhandled' because handler
registration happened only after initialSync completed.
The handlers only depend on c.agents and c.broker, which are wired in the
constructor — they do not require initialSync to have completed.
Also adds TestConnectAndRun_EventNotLostDuringSync regression test that
sends a live presence event during initial sync and asserts it is not lost.
All gateway tests pass with -race.
The root cause of the initial sync timeout was that connectAndRun called
initialSync (which uses Send/RPC) before starting readLoop, but Send's
response delivery depends on readLoop→routeFrame→handleResponse. Without
the readLoop running, agents.list and sessions.list would always time out.
Fix: start readLoop in a goroutine before calling initialSync so that
RPC responses are properly routed back to pending Send() calls. After
initialSync completes, event handlers are registered and MarkWSReady
is called. The connectAndRun function then blocks on the readLoop
goroutine's completion.
Also added TestConnectAndRun_InitialSyncOrdering which verifies that
agents are persisted from initial sync (would hang/timeout under the
old ordering).
🔴 readLoop race: replace WriteControl close with ctx-done goroutine that closes conn
🔴 duplicate event handlers: clear handlers map before re-registering on reconnect
🔴 sync.go CurrentTask abuse: add DisplayName field to UpdateAgentRequest, use it
🔴 sync.go newRole dead code: add Role field to UpdateAgentRequest, use it
🔴 events.go handlePresence DB/SSE inconsistency: pass LastActivityAt in update, don't mutate after DB
🔴 events.go handleAgentConfig DB/SSE inconsistency: use DisplayName/Role fields in update
🟠 Send() nil-conn panic: check conn != nil before WriteJSON
🟠 readLoop prompt ctx cancellation: fixed by item #1
🟠 backoff never resets: reset to initialBackoff after successful connectAndRun
🟠 MarkWSReady double-close race: use sync.Once in Client
Extra json:"-" dead fields: removed from sessionChangedPayload, presencePayload, agentConfigPayload
UpdateAgentRequest: added DisplayName, Role, LastActivityAt fields
