Content type and archive listing move from files to file_details

Every probe rewrote its file's row on the HDD (content_type, archive):
a new row version on a random page and an entry in each of the five
indexes. They now live in file_details on the NVMe; files rows are
inserted once. files:move-details copies the existing values after
the deploy; a later migration drops the old columns.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/services/GarbageFilter.ts

@@ -196,8 +196,8 @@ class GarbageFilter {
   async seed(percent: number): Promise<number> {
     const { rows } = await db.rawQuery(
       `SELECT DISTINCT ON (f.release_id) f.release_id, f.first_message_id, f.groups
-       FROM files f TABLESAMPLE SYSTEM (?)
-       WHERE f.content_type IS NOT NULL AND f.release_id IS NOT NULL AND NOT is_readable_name(f.filename)`,
+       FROM files f TABLESAMPLE SYSTEM (?) JOIN file_details d ON d.file_id = f.id
+       WHERE d.content_type IS NOT NULL AND f.release_id IS NOT NULL AND NOT is_readable_name(f.filename)`,
       [percent]
     )
     let added = 0