fix: FixRawSize SQL column name, join, and filetype bugs (#1037)

Four SQL bugs in task_fix_rawSize.go, all introduced in #855:

1. CanAccept: mpd.miner_id → l.miner_id
   market_piece_deal has no miner_id column; join should reference
   sector_location.miner_id.
   Error: column mpd.miner_id does not exist (SQLSTATE 42703)

2. Do + CanAccept: mpd.sector_number → mpd.sector_num
   market_piece_deal column is sector_num, not sector_number.
   Masked in Do() because CanAccept always fails first.

3. Do: same sector_number fix in sectors_meta join condition.

4. CanAccept: sector_filetype = 4 → sector_filetype = 1
   Restored to FTUnsealed (original value before #855). The task reads
   piece data via ReadPiece() which requires unsealed sector data, not
   cache. The existing panic guard (storiface.FTUnsealed != 1) confirms
   the original intent. Changed to 4 (FTCache) during the #855 rewrite
   by copying the pattern from task_treed.go (which correctly uses
   FTCache for its own purposes).

Every other query against market_piece_deal in the codebase correctly
uses sector_num (task_check_indexes.go, cachedreader.go, market.go).

Full column-by-column audit performed against schema definitions in:
  20260211-fix-raw-size-table.sql, 20240731-market-migration.sql,
  20240425-sector_meta.sql, 20230712-sector_index.sql.

All 7 queries in the file verified.

Follow-up to #1035 (array cast fix).

Author: Reiers

tasks/storage-market/task_fix_rawSize.go

@@ -40,10 +40,10 @@ func (f *FixRawSize) Do(taskID harmonytask.TaskID, stillOwned func() bool) (done
 
 	var id, pieceCidStr string
 	var spID, sectorNumer, pieceOffset, pieceSize, proof int64
-	err = f.db.QueryRow(ctx, `SELECT f.id, mpd.sp_id, mpd.sector_number, mpd.piece_cid, mpd.piece_offset, mpd.piece_length, m.reg_seal_proof 
+	err = f.db.QueryRow(ctx, `SELECT f.id, mpd.sp_id, mpd.sector_num, mpd.piece_cid, mpd.piece_offset, mpd.piece_length, m.reg_seal_proof 
 									FROM market_fix_raw_size f 
 									INNER JOIN market_piece_deal mpd ON f.id = mpd.id
-									INNER JOIN sectors_meta m ON mpd.sp_id = m.sp_id AND mpd.sector_number = m.sector_num
+									INNER JOIN sectors_meta m ON mpd.sp_id = m.sp_id AND mpd.sector_num = m.sector_num
 									WHERE  f.task_id = $1 AND mpd.raw_size = 0 
 									    AND piece_offset IS NOT NULL 
 									LIMIT 1`, taskID).Scan(&id, &spID, &sectorNumer, &pieceCidStr, &pieceOffset, &pieceSize, &proof)
@@ -129,7 +129,7 @@ func (f *FixRawSize) CanAccept(ids []harmonytask.TaskID, engine *harmonytask.Tas
 	err := f.db.QueryRow(ctx, `SELECT COALESCE(array_agg(task_id), '{}')::bigint[] AS task_ids FROM (
 						SELECT f.task_id FROM market_fix_raw_size f
 						INNER JOIN market_piece_deal mpd ON f.id = mpd.id
-						INNER JOIN sector_location l ON mpd.sp_id = mpd.miner_id AND mpd.sector_number = l.sector_num AND l.sector_filetype = 4
+						INNER JOIN sector_location l ON mpd.sp_id = l.miner_id AND mpd.sector_num = l.sector_num AND l.sector_filetype = 1
 						INNER JOIN storage_path sp ON sp.storage_id = l.storage_id 
 						WHERE f.task_id = ANY($1::bigint[])  AND sp.urls IS NOT NULL AND sp.urls LIKE '%' || $2 || '%' LIMIT 100) s`, indIDs, engine.Host()).Scan(&acceptedIDs)
 	if err != nil {