fix: manual admin tenant migration state recording

[ferhatelmas]

What kind of change does this PR introduce?

Bug fix

What is the current behavior?

Manual migration run via admin doesn't update tenant migration status in multitenant database.

What is the new behavior?

State is correctly updated.

Additional context

Extracted a helper for the same state updating query.

[Copilot]

Pull request overview

Fixes admin-triggered tenant migrations not recording migration completion state in the multitenant tenants table, bringing manual admin runs in line with other migration execution paths.

Changes:

• Use updateTenantMigrationsState to consistently mark tenant migrations as COMPLETED after successful admin-initiated runs.
• Extract a small helper (markTenantMigrationsCompleted) to deduplicate the state update logic across multiple admin tenant routes.
• Add tests verifying that manual admin tenant migrations persist migrations_version/migrations_status, including when dbMigrationFreezeAt is configured.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/http/routes/admin/tenants.ts	Ensures successful admin-triggered tenant migrations record completed migration state via shared helper.
src/test/admin-migrations.test.ts	Adds regression tests asserting tenant migration state is recorded (normal + frozen target).

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.