Replace the cosmetic 'forward' mode (which was the same single-pass backtest
with a mode string) with a genuine forward paper-portfolio lifecycle:
- backend/app/forward_test.py: ForwardTestStore — durable, thread-safe JSON
store of forward runs with an explicit status lifecycle:
frozen (signals snapshotted, immutable) -> executed (fills 50/20/30
buckets at post-freeze prices) -> marked (mark-to-market equity series ->
matured (net_return finalised).
Frozen signals can never be re-read/rewritten after creation, so later data
cannot retroactively change what the run decided.
- backend/app/__init__.py: GET /api/v1/forward (+<id>), POST /api/v1/forward
(create+execute, with use_pit to freeze PIT or current-board scores),
POST /<id>/mark, POST /<id>/mature. ForwardTestStore wired as an extension
backed by data/forward/runs.json (survives restarts).
- tests: lifecycle store (7) — full backend suite 280 passed. Live probe:
create->execute (2xx, real holdings), list, mark, mature all work and the
run persists.
Honest scope: the score source at CREATE time may be the current board
(non_pit=true, tagged); paper-only, no MT5 send. A PIT scorer only marks a run
non_pit=false when its scores assert pit_meta.pit=true.
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