🐛(backend) normalize raw S3 object keys

Correction to preserve already encoded plus signs in addition to slashes.

src/backend/core/tests/recording/event/test_parsers.py

@@ -406,6 +406,32 @@ def test_s3_parser_accepts_unencoded_filepath(settings):
     assert parser.get_recording_id(data) == recording_id
 
 
+def test_s3_parser_preserves_plus_signs_in_raw_filepath(settings):
+    """Test S3 parser preserves plus signs while encoding slash separators."""
+    settings.RECORDING_OUTPUT_FOLDER = "recordings"
+
+    recording_id = "80ae9fe5-639a-438b-b86e-9e3dd2d55f4d"
+    parser = S3Parser(bucket_name="recordings-bucket")
+
+    data = {
+        "Records": [
+            {
+                "s3": {
+                    "bucket": {"name": "recordings-bucket"},
+                    "object": {
+                        "key": f"folder+name/recordings/{recording_id}.mp4",
+                    },
+                }
+            }
+        ]
+    }
+
+    event = parser.parse(data)
+
+    assert event.filepath == f"folder+name%2Frecordings%2F{recording_id}.mp4"
+    assert parser.validate(event) == recording_id
+
+
 def test_s3_get_recording_id_success(s3_parser, valid_s3_event):
     """Test successful extraction of recording ID from S3 event."""
     recording_id = s3_parser.get_recording_id(valid_s3_event)