Add reserve context

Author: tconley1428

tests/worker/test_worker.py

@@ -471,7 +471,12 @@ async def reserve_slot(self, ctx: SlotReserveContext) -> SlotPermit:
             self.reserve_asserts(ctx)
             # Verify an async call doesn't bungle things
             await asyncio.sleep(0.01)
-            logger.info("Reserve slot %d", self.reserves)
+            logger.info(
+                "Reserve slot %d - %s - %s",
+                self.reserves,
+                ctx.slot_type,
+                ctx.task_queue,
+            )
             self.reserves += 1
             return MyPermit(self.reserves)