Automatically keep the real dated dividend ledger fresh inside the app's own
refresh loop (this app runs on its own server, independent of Hermes):
- backend/app/scheduler.py: AppDataScheduler gained a cooldown-gated
_maybe_refresh_dated_dividends() that fetches real dated dividend history
(siamchart /stock-info) into data/dividends/ledger.json at most once per
dividend_cooldown_seconds (default 6h) — dividend history changes only a
few times a year, so we never hammer the source every refresh tick. The
fetch is non-fatal: a network failure leaves the previous ledger intact.
- backend/app/__init__.py: passes DIVIDEND_REFRESH_COOLDOWN_SECONDS to the
scheduler (default 21600s).
- tests: cooldown fires once then skips, and refetches after it elapses (2)
— full backend 294 passed.
- scheduler.py: daemon thread inside Flask refreshes all real Thai collectors on interval (default 60min, REFRESH_INTERVAL_SECONDS) via shared daily cache + writes timestamped marker
- create_app starts scheduler (skipped in TESTING); shared daily_cache now an extension
- GET /api/v1/data/last-refresh: automation status + last refresh (every N hours)
- Live verified: refresh_all pulls 5/5 real sources (tourism/auto/NPL/energy/macro)
- 2 tests; full suite 197 OK
