feat(deployments): show live service logs after successful deploy

[Rish-it]

Closes #667

Summary

• switch successful compose service tabs from frozen build output to the existing per-service runtime log stream
• keep Prepare, failed/non-running services, in-progress deployments, and pending keep/reject decisions on build history
• connect only the active tab, backfill the latest 100 lines, retry unexpected disconnects up to five times, and stop on a terminal stream event
• propagate natural runtime-log completion across runtime adapters and flush the SSE end frame before cleanup, including subscribe-time end and abort races

Verification

• API: 420 files, 5,118 passed, 3 skipped
• Dashboard: 100 files, 1,100 passed
• Adapters: 167 files, 3,380 passed
• API, dashboard, and adapters tsc --noEmit
• git diff --check

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