Stage 2: the manual 'Download Wishlist' flow now calls the same
_run_wishlist_cycle engine the auto timer uses, so a manual scan runs the exact
same code path as an auto scan. The old bespoke manual orchestration (build
payloads + SERIAL inline dispatch) is deleted — its grouping/dispatch was a
near-duplicate of auto's that had already drifted.
Behavior changes (all intended, discussed):
- Manual now dispatches album bundles in PARALLEL (album pool) like auto, instead
of serially on one thread. A single cycle='albums' engine call covers the whole
selection (albums bundled, singles/ungroupable -> per-track residual), so no
'both cycles' pass is needed.
- The manual placeholder batch_id is reused as the engine's first sub-batch
(first_batch_id), so the modal's existing poll target stays valid.
- WishlistManualDownloadRuntime gains album_bundle_executor (wired in web_server,
falls back to the shared pool when unset).
- 'Don't start manual while auto is running' is unchanged — the existing route
guard (is_wishlist_actually_processing -> 409) already covers it; no queue added.
NOT touched: process_wishlist_automatically's behavior (proven by test_automation
staying green in Stage 1) and the per-track download mechanics.
test_manual_download.py rewritten to characterize the new behavior (engine
dispatch via the executor, parallel, placeholder reuse, album-context). Full
wishlist suite green (131); wishlist + automation = 392 passed.
BoulderBadgeDad
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