match a camera's frame names exactly in close_camera

The prefix match on `{camera}_frame` also caught another camera whose name starts with it, so removing `cam` dropped the cached ring of a camera named `cam_frame`.

frigate/test/test_shared_memory_frame_manager.py

@@ -289,10 +289,17 @@ class TestSharedMemoryFrameManagerFrameTimes(unittest.TestCase):
         manager.shm_store.update(
             _segments(cam_frame0=1, cam_frame1=1, cam_frame_times=8, other_frame0=1)
         )
+        # a camera named cam_frame shares the cam_frame prefix
+        manager.shm_store.update(
+            {"cam_frame_frame0": _fake_shm(1), "cam_frame_frame_times": _fake_shm(8)}
+        )
 
         manager.close_camera("cam")
 
-        self.assertEqual(set(manager.shm_store), {"other_frame0"})
+        self.assertEqual(
+            set(manager.shm_store),
+            {"other_frame0", "cam_frame_frame0", "cam_frame_frame_times"},
+        )
 
     def test_get_without_frame_time_skips_ledger(self) -> None:
         manager = SharedMemoryFrameManager()

frigate/util/image.py

@@ -1171,8 +1171,11 @@ class SharedMemoryFrameManager(FrameManager):
 
     def close_camera(self, camera: str) -> None:
         """Drop every cached mapping for a camera's frame ring and ledger."""
-        for name in [n for n in self.shm_store if n.startswith(f"{camera}_frame")]:
-            self.close(name)
+        for name in list(self.shm_store):
+            owner, _, suffix = name.rpartition("_frame")
+
+            if owner == camera and (suffix.isdigit() or suffix == "_times"):
+                self.close(name)
 
     def delete(self, name: str):
         if name in self.shm_store: