Add full sortof codebase: API, drain workers, frontend, schema, specs

init/04_required_wsids.sql

@@ -0,0 +1,12 @@
+-- Required Items scraped from each mod's Steam Workshop page (the "Required
+-- Items" section). Steam's anonymous GetPublishedFileDetails endpoint does
+-- not include children for individual mods, so we scrape the public HTML.
+--
+-- Use cases:
+--   1. Auto-resolving missing-dep warnings: when a cached mod_id Y is
+--      missing dep X, we look at Y's source wsid's required_wsids and
+--      auto-queue any uncached wsids — the next sort resolves X.
+--   2. Surfacing "↗ add <wsid>" actions for unresolved deps so the user
+--      can pull them with one click.
+ALTER TABLE workshop_meta
+    ADD COLUMN IF NOT EXISTS required_wsids TEXT[] NOT NULL DEFAULT '{}';