fix(db): renumber duplicate migration 000058_seed_purchaser_group to 000059 (base collision from #803+#924)

The base feat/multicloud-web-frontend merged two 000058 migrations from the
recent wave, which the check-migration-conflicts pre-commit hook rejects:
- 000058_purchase_executions_direct_execute_audit (#803, schema change)
- 000058_seed_purchaser_group (#924, data seed)

Keep the schema-change audit migration at 000058 and renumber the seed
migration to the next free slot, 000059 (base jumps 000058 -> 000063, so
000059-000062 are open). golang-migrate discovers migrations by filename
glob, so no embed list needs updating; only two self-references were
adjusted:
- auth/types.go GroupPurchaser doc comment pointing at the filename
- the self-referencing error message inside the up.sql

Safe to renumber without applied-state reconciliation: the base has not
compiled since the #803/#907 break, so neither 000058 migration has been
applied to any database yet.

Author: cristim

internal/auth/types.go

@@ -317,7 +317,7 @@ const DefaultPurchaserGroupID = "00000000-0000-5000-8000-000000000005"
 
 // GroupPurchaser is the canonical name of the system-managed Purchaser
 // group. MUST match the literal name inserted by migration
-// 000058_seed_purchaser_group.up.sql so name-based lookups agree with
+// 000059_seed_purchaser_group.up.sql so name-based lookups agree with
 // the seeded row.
 const GroupPurchaser = "Purchaser"
 

…ons/000058_seed_purchaser_group.down.sql …ons/000059_seed_purchaser_group.down.sqlinternal/database/postgres/migrations/000058_seed_purchaser_group.down.sql renamed to internal/database/postgres/migrations/000059_seed_purchaser_group.down.sql internal/database/postgres/migrations/000058_seed_purchaser_group.down.sql renamed to internal/database/postgres/migrations/000059_seed_purchaser_group.down.sql

@@ -35,7 +35,7 @@ BEGIN
           AND id <> '00000000-0000-5000-8000-000000000005'
     ) THEN
         RAISE EXCEPTION
-            'migration 000058: a group named ''Purchaser'' already exists with a different id; rename it before applying this migration so the seeded id (00000000-0000-5000-8000-000000000005) can be created';
+            'migration 000059: a group named ''Purchaser'' already exists with a different id; rename it before applying this migration so the seeded id (00000000-0000-5000-8000-000000000005) can be created';
     END IF;
 END $$;