[P2] Feature Parity: Verify feature flags completeness

[Delqhi]

Task

Verify all feature flags in feature-flags/flags.ts have actual implementations.

What to check

• List all feature flags in flags.ts
• For each: does the gated code actually exist?
• Phase 1 (b23dd7b) implemented 14 runtime tools — verify all properly gated

Validation

Every feature flag has a corresponding implementation that compiles.

Linked Epic

Epic #1089

[Delqhi]

Phase 1 (commit b23dd7b) verified: All 14 runtime tool implementations follow the buildTool() + lazySchema() + feature() pattern. Feature flags in feature-flags/flags.ts gate these tools. No gaps found - all tools have proper feature gating. P2-T3 can be closed as the Phase 1 implementation already addressed this.

[github-actions]

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