Add app release progress and summary views

[kacy]

Summary

• add app release progress counts and live progress updates to shared apply reporting
• add previous-successful release context to app status plus a new yoq apps / GET /apps summary view
• fix local app rollback selection and preserve live progress counts on backend failure after mutation

Validation

• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='getPreviousSuccessfulDeploymentByAppInDb excludes current release'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='writeAppStatusJsonObject round-trips through remote parser'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='app status and history surface failed apply metadata from persisted rows'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='appStatusFromReport preserves partially failed local release state'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='listLatestDeploymentsByAppInDb returns one latest row per app'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='formatAppsResponse emits one latest summary per app'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='route rejects app list without cluster'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='formatAppProgress summarizes in-flight and partial outcomes'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='rollbackApp returns previous successful snapshot instead of current successful release'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='rollbackApp returns last successful snapshot when latest release failed'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='execute preserves live progress counts when backend fails after mutation'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='execute marks completed releases on backend success'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='execute attaches a live progress recorder when backend supports it'
• YOQ_SKIP_SLOW_TESTS=1 zig build test -Doptimize=ReleaseSafe -Dtest-filter='app apply then rollback routes preserve release transition metadata'
• git diff --check