feat(daemon): FireEvent + event name resolution + in-process gRPC tests

- name_index: add resolve_event(name) -> CEID (unit-tested).
- equipment_service.hpp: extract the gRPC service + value/state conversion
  into a shared header; add FireEvent (optional per-fire variable values,
  then trigger the collection event by name). secs_gemd slims to main().
- test_daemon_service: real in-process gRPC integration test (client stub ->
  service -> EquipmentRuntime) proving SetVariables lands in the model,
  GetControlState reports the state, FireEvent and unknown-name paths behave.
  Separate secs_gemd_tests target (links grpc++/proto), gated on the daemon.

Core suite 459/459 (2799 assertions); daemon gRPC tests 15/15.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

include/secsgem/gem/name_index.hpp

@@ -24,4 +24,12 @@ inline std::optional<uint32_t> resolve_variable(const EquipmentDataModel& m,
   return std::nullopt;
 }
 
+// Resolve a collection-event name to its CEID. nullopt if unknown.
+inline std::optional<uint32_t> resolve_event(const EquipmentDataModel& m,
+                                             const std::string& name) {
+  for (const auto& e : m.events.all_events())
+    if (e.name == name) return e.id;
+  return std::nullopt;
+}
+
 }  // namespace secsgem::gem