Remove Unused Database Table system_access_instance_microsoft_applications

Background

The system_access_instance_microsoft_applications table was created in milestone 17.5 for Microsoft Azure integration but is no longer needed due to architecture changes.

Table Details

• Created: Migration 20240829143538_create_system_access_instance_microsoft_applications.rb
• Model: SystemAccess::InstanceMicrosoftApplication
• Schema: gitlab_main_cell_local

Tasks

• Verify table is unused in production (no records, no active integrations)
• Remove model SystemAccess::InstanceMicrosoftApplication (if exists)
• Remove factory: ee/spec/factories/system_access/instance_microsoft_applications.rb
• Remove docs: db/docs/system_access_instance_microsoft_applications.yml
• Update .rubocop_todo/migration/prevent_adding_attr_encrypted_columns.yml
• Update db/post_migrate/20250425082347_fix_seq_ownership_for_build_metadata.rb
• Create drop table migration with safety checks
• Run full test suite

Related Issues

• #463788 (closed) - Set sharding keys for Microsoft applications
• #508117 (closed) - Breakdown DB updates for system_access_group_microsoft_applications
• #571792 - Remove temp_source_id column