Carrier negotiation + WebSocket lifecycle

Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>

src/config/load/strict_keys.rs

@@ -339,6 +339,9 @@ const WEB_TIMEOUTS_CONFIG_KEYS: &[&str] = &[
     "stream_handshake_secs",
     "stream_first_byte_secs",
     "long_poll_secs",
+    "bridge_request_secs",
+    "bridge_retry_secs",
+    "carrier_probe_coalesce_ms",
     "lane_open_wait_secs",
     "carrier_health_secs",
     "websocket_upgrade_secs",

src/config/load/validate_web/timeouts.rs

@@ -33,6 +33,18 @@ pub(super) fn validate(timeouts: &WebTimeoutsConfig) -> Result<()> {
     if !(2..=86_400).contains(&timeouts.carrier_learning_secs) {
         return config_error("web.timeouts.carrier_learning_secs must be within [2, 86400]");
     }
+    if !(1..=60).contains(&timeouts.bridge_request_secs) {
+        return config_error("web.timeouts.bridge_request_secs must be within [1, 60]");
+    }
+    if !(1..=300).contains(&timeouts.bridge_retry_secs) {
+        return config_error("web.timeouts.bridge_retry_secs must be within [1, 300]");
+    }
+    if timeouts.bridge_request_secs > timeouts.bridge_retry_secs {
+        return config_error("web.timeouts.bridge_request_secs must not exceed bridge_retry_secs");
+    }
+    if timeouts.carrier_probe_coalesce_ms > 10 {
+        return config_error("web.timeouts.carrier_probe_coalesce_ms must be within [0, 10]");
+    }
     if timeouts.stream_first_byte_secs > 300 {
         return config_error("web.timeouts.stream_first_byte_secs must be within [1, 300]");
     }