PR #5765 (MUL-5150) branched before #5841 merged, so both landed a 213
migration and Backend CI's TestMigrationNumericPrefixesStayUniqueAfterLegacySet
failed on main. Bump #5765's pair to the next free prefixes, preserving the
column-before-index order:
213_chat_session_project -> 214_chat_session_project
214_chat_session_project_index -> 215_chat_session_project_index
MUL-5251
Co-authored-by: Bohan-J <bohan@devv.ai>
Co-authored-by: multica-agent <github@multica.ai>