Optimize web schema indexes

[techulus-agent]

Summary

• remove redundant and low-value indexes from deployments, builds, GitHub repositories, and service revisions
• add missing foreign-key lookup indexes for service-owned resources and GitHub installations
• align backup, rollout, build, and work-queue indexes with their filtering and ordering patterns

Why

The schema mixed redundant indexes with gaps around common relationship lookups and history queries. This reduces unnecessary index maintenance while improving the paths used to load service resources, recent history, backups, and queued work.

Impact

This changes database index definitions only. It does not change application behavior and intentionally does not include a database push or generated migration.

Validation

• pnpm exec biome check db/schema.ts
• pnpm exec tsc --noEmit
• pnpm test — 21 files and 115 tests passed
• git diff --check

[github-actions]

React Doctor found no new issues. 🎉

_{Reviewed by React Doctor for commit c34303b.}

[arjunkomath]

Reviewed the index changes against the actual Drizzle query patterns. The added FK/composite indexes match service-resource, history, backup, build, and queue lookups; removed indexes are redundant or low-value. Schema-only delivery also matches the repository's drizzle-kit push workflow. No blocking findings.

CI is green, including build, CodeQL, and React Doctor.