feat: add quiet-hours, billing/usage, api-keys revoke, trash restore

[Akpamgbo]

Summary

Closes #1048
Closes #1045
Closes #1040
Closes #1022

Changes

#1048 — POST /api/routes-d/quiet-hours

Configure quiet hours for notifications. Validates enabled (boolean), startTime/endTime (HH:MM format when enabled), and days (mon–sun). Upserts a notificationPreference record with quietHours JSON.

#1045 — GET /api/routes-d/billing/usage

Current usage and plan limits. Aggregates invoice count, API call count, and storage bytes for the current billing period. Returns per-resource used/limit pairs based on the user's subscription plan (free/starter/pro/enterprise).

#1040 — DELETE /api/routes-d/api-keys/[id]

Revoke an API signing key. Verifies ownership, returns 404 if not found, 409 if already revoked. Sets revoked: true and revokedAt, returns 204 No Content.

#1022 — POST /api/routes-b/trash/[id]/restore

Restore an item from trash. Finds the trashItem by id and user, removes it from trash and clears deletedAt on the associated resource in a single $transaction. Wrapped with withRequestId.

Test plan

• Quiet hours: 422 on non-boolean enabled, 422 on bad time format, 200 on success
• Billing usage: 200 with correct plan limits and aggregated usage
• API key revoke: 404 not found, 409 already revoked, 204 on success
• Trash restore: 404 when not in trash, 200 with restored resource info

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