Fix CI: pin fastmcp<3 and use Job.id instead of removed get_id()

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: mitchh456

src/scout_apm/rq.py

@@ -66,7 +66,7 @@ def wrap_perform(wrapped, instance, args, kwargs):
 
     tracked_request = TrackedRequest.instance()
     tracked_request.is_real_request = True
-    tracked_request.tag("task_id", instance.get_id())
+    tracked_request.tag("task_id", instance.id)
     tracked_request.tag("queue", instance.origin)
     # rq strips tzinfo from enqueued_at during serde in at least some cases
     # internally everything uses UTC naive datetimes, so we operate on that

tox.ini

@@ -31,7 +31,7 @@ deps =
     elasticsearch<8.0.0; python_version <= "3.9"
     elasticsearch<9; python_version > "3.9"
     falcon
-    fastmcp>=2.9.0; python_version >= "3.10"
+    fastmcp>=2.9.0,<3; python_version >= "3.10"
     flask
     flask-sqlalchemy
     hiredis