fix(sse): disable read deadline for long-lived SSE connections

The server's ReadTimeout (15s) was closing SSE connections shortly after
they were established, causing a rapid connect/disconnect loop. The handler
already disabled WriteTimeout but not ReadTimeout.

internal/api/sse_handler.go

@@ -16,9 +16,12 @@ func (s *Server) HandleEvents(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// Disable the write deadline for this long-lived connection.
-	// The server's WriteTimeout (15s) would otherwise kill it.
+	// Disable read and write deadlines for this long-lived connection.
+	// The server's ReadTimeout/WriteTimeout (15s) would otherwise kill it.
 	rc := http.NewResponseController(w)
+	if err := rc.SetReadDeadline(time.Time{}); err != nil {
+		s.logger.Warn().Err(err).Msg("failed to disable read deadline for SSE")
+	}
 	if err := rc.SetWriteDeadline(time.Time{}); err != nil {
 		s.logger.Warn().Err(err).Msg("failed to disable write deadline for SSE")
 	}