refactor(db): Add MVE scheduler support

[michalkrzyz]

On-behalf-of: SAP Michal Krzyz michal.krzyz@sap.com

Description

• Add MVE (Materialized View Engine) scheduler
• Remove list of post migration procedures from sql schema
• Adjust e2e for db_migration

Please include a summary of the changes and the related issue. Please also include relevant motivation and context. List any dependencies that are required for this change.

What type of PR is this? (check all applicable)

• 🍕 Feature
• 🐛 Bug Fix
• 📝 Documentation Update
• 🎨 Style
• 🧑‍💻 Code Refactor
• 🔥 Performance Improvements
• ✅ Test
• 🤖 Build
• 🔁 CI
• 📦 Chore (Release)
• ⏩ Revert

Related Tickets & Documents

• Related Issue # (issue)
• Closes # (issue)
• Fixes # (issue)

Remove if not applicable

Added tests?

• 👍 yes
• 🙅 no, because they aren't needed
• 🙋 no, because I need help
• Separate ticket for tests # (issue/pr)

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

Added to documentation?

• 📜 README.md
• 🤝 Documentation pages updated
• 🙅 no documentation needed
• (if applicable) generated OpenAPI docs for CRD changes

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[Copilot]

Pull request overview

This PR refactors MariaDB “post-migration” behavior by introducing an MVE (Materialized View Engine) scheduler that periodically triggers MV refresh stored procedures, while removing the legacy post-migration procedure registry mechanism and adapting e2e migration tests accordingly.

Changes:

• Add an MVE scheduler/trigger implementation in the MariaDB layer and integrate it into the migration flow.
• Remove the legacy post_migration_procedure_registry table and related stored procedures via a new migration.
• Update e2e DB migration tests/fixtures to stop using the removed post-migration registry and instead configure MVE procedures directly.

Reviewed changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
internal/database/mariadb/mve.go	Introduces MVE trigger + scheduler implementation and first-run wait signaling.
internal/database/mariadb/migration.go	Switches post-migration handling to MVE scheduler (async) and TriggerMVE (sync), and changes WaitPostMigrations semantics.
internal/database/interface.go	Updates Database interface to make WaitPostMigrations non-error-returning.
internal/app/heureka.go	Aligns app wrapper method signature with updated database interface.
internal/e2e/common/server.go	Updates server startup helper to call WaitPostMigrations without asserting on an error return.
internal/e2e/db_migration_test.go	Adjusts e2e migration setup to configure MVE procedures and removes post-migration registry fixture usage.
internal/e2e/migrations/70250915164215_add_post_migration.up.sql	Removes obsolete e2e migration fixture that registered a post-migration procedure.
internal/e2e/migrations/70250915164215_add_post_migration.down.sql	Removes obsolete e2e migration fixture down script.
internal/database/mariadb/migrations/20260701112108_app_scheduler.up.sql	Drops legacy post-migration registry table/procedures.
internal/database/mariadb/migrations/20260701112108_app_scheduler.down.sql	Restores legacy post-migration registry table/procedures on rollback.
go.mod	Adds scheduler-related dependencies (includes an apparently unused gocron/v2 entry).
go.sum	Updates module sums for the newly introduced dependencies.

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[Copilot]

Pull request overview

Copilot reviewed 12 out of 13 changed files in this pull request and generated 4 comments.