Support multiple domains per HTTP port

[arjunkomath]

Summary

• allow distinct public HTTP domains to share one service container port across the UI, public API, revision model, and CLI
• publish each numeric container port once while preserving historical deployment mappings and one route/certificate entry per domain
• generate opaque, owner-scoped Traefik resource identities and reconcile against a canonical hash of the complete generated routes configuration
• attribute access logs and forwarded Traefik metrics through explicit expected-state ownership metadata; service metrics now query exact service_id labels
• make port mutations atomic and serialize TCP/UDP external-port allocation through the active transaction

Validation

• Web: 301 tests passed
• Web: tsc --noEmit
• Agent: go test ./... and go build ./...
• CLI: go test ./... and go build ./...
• git diff --check

Review

The implementation plan and completed architecture were reviewed with Oracle. Follow-up fixes preserve cross-protocol numeric-port reuse, normalize historical duplicate physical mappings, cover serverless aliases, fail closed on untrusted metric attribution, and remove all parsing of semantic identity from Traefik resource names.

[github-actions]

React Doctor found no issues. 🎉

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_{Reviewed by React Doctor for commit 8ca9bbf.}