Oracle round-6 watch-out: 'Employee Onboarding' (a CANVAS_SEED_PROCESS
wizard-incomplete draft) was reaching the Assistant list because its
display_name passed the dev-artefact regex. EA2 runtime then returned
500 transaction_creation_failed because it lacked view/data attachments.
- flowCuration.NON_BUSINESS_SOURCE_CONTEXTS now drops CANVAS_SEED_PROCESS,
CANVAS_SEED_STEP, CANVAS_CHAT_INBOX, CANVAS_ATTENDANCE_ROOT,
CANVAS_ATTENDANCE_SITE - all internal canvas source_contexts.
- qa/full_dogfood.mjs new assertion 'assistant_list_processes_all_startable'
posts each Assistant-listed flow to /api/runtime/transactions and
asserts non-4xx/5xx response.
