Rebuild From Source

Re-derive the working list from data/source/sec_universe.json.

Use this to:

• Undo recent runtime deletions (SPACs/shells/bad-CIKs pruned by the EDGAR cycle-restart block) — every stock comes back with zeroed counters and gets re-attempted on the next cycle.
• Pick up a fresh SEC universe just-committed via scripts/refresh_sec_universe.py.

Equivalent to running scripts/rebuild_working_list.py + reloading the background service — but in-process and instant, no redeploy.

Note: a flyctl deploy also resets the working list to the bundled version, so this endpoint is purely a convenience for skipping the deploy cycle.