Shot Viewer: sequence field, cameras named CAM_sq0000_sh0000

The Shot Viewer panel gets a Sequence number, saved with the scene. New
shot cameras are named from it with SHOT_CAMERA_NAME_FORMAT
("{prefix}{sequence}_{shot}") and SEQUENCE_NAME_FORMAT ("sq{:04d}"),
both overridable in the config JSON.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

config.py

@@ -246,6 +246,11 @@ SHOT_VIEWER_RIG_GROUPS = {
 
 # Shots added by the shot viewer. TODO: confirm with production.
 SHOT_NAME_FORMAT = "sh{:04d}"
+# Sequence of the scene (number set in the Shot Viewer panel): SEQUENCE_NAME_FORMAT.format(number).
+SEQUENCE_NAME_FORMAT = "sq{:04d}"
+# Cameras added by the shot viewer. Tokens: {prefix} (OBJECT_PREFIXES["CAMERA"]),
+# {sequence} (SEQUENCE_NAME_FORMAT) and {shot} (the shot name).
+SHOT_CAMERA_NAME_FORMAT = "{prefix}{sequence}_{shot}"
 SHOT_NUMBER_STEP = 10
 SHOT_FRAME_START = 1001
 SHOT_DEFAULT_DURATION = 48