fix(migrations): renumber purchase_history_revocation 000057 -> 000059

Three PRs were dispatched in parallel and each independently picked the
same "next free" migration number 000057. PR #802 (universal-plans
cleanup) took 000057, PR #803 (execute-permissions) renumbered to 000058
in a follow-up, and this PR (#804, revocation) now takes 000059.

- 000057_purchase_history_revocation.up.sql -> 000059_*
- 000057_purchase_history_revocation.down.sql -> 000059_*
- internal/config/store_postgres.go: comment ref "migration 000057"
  -> "migration 000059"
- migration file headers updated

Verified 000059 is free on origin/feat/multicloud-web-frontend and no
other open PR introduces a clashing migration.

Per `project_migration_number_collisions.md`.

Author: cristim

internal/config/store_postgres.go

@@ -1540,7 +1540,7 @@ func (s *PostgresStore) GetPurchaseHistoryFiltered(
 //	estimated_savings, plan_id, plan_name, ramp_step, cloud_account_id,
 //	revocation_window_closes_at, revoked_at, revoked_via, support_case_id
 //
-// The revocation columns were added in migration 000057. Queries must
+// The revocation columns were added in migration 000059. Queries must
 // include them explicitly so the Scan targets stay in sync.
 func (s *PostgresStore) queryPurchaseHistory(ctx context.Context, query string, args ...any) ([]PurchaseHistoryRecord, error) {
 	rows, err := s.db.Query(ctx, query, args...)

…057_purchase_history_revocation.down.sql …059_purchase_history_revocation.down.sqlinternal/database/postgres/migrations/000057_purchase_history_revocation.down.sql renamed to internal/database/postgres/migrations/000059_purchase_history_revocation.down.sql internal/database/postgres/migrations/000057_purchase_history_revocation.down.sql renamed to internal/database/postgres/migrations/000059_purchase_history_revocation.down.sql

@@ -1,4 +1,4 @@
--- Rollback 000057: remove revocation columns from purchase_history
+-- Rollback 000059: remove revocation columns from purchase_history
 DROP INDEX IF EXISTS idx_purchase_history_revocation_window;
 
 ALTER TABLE purchase_history

…00057_purchase_history_revocation.up.sql …00059_purchase_history_revocation.up.sqlinternal/database/postgres/migrations/000057_purchase_history_revocation.up.sql renamed to internal/database/postgres/migrations/000059_purchase_history_revocation.up.sql internal/database/postgres/migrations/000057_purchase_history_revocation.up.sql renamed to internal/database/postgres/migrations/000059_purchase_history_revocation.up.sql

@@ -1,4 +1,4 @@
--- Migration 000057: add revocation columns to purchase_history
+-- Migration 000059: add revocation columns to purchase_history
 --
 -- AWS EC2 RIs: no direct cancel API; the 24h free-cancel window requires an
 -- AWS Support case (support:CreateCase). AWS support-case revocation is