Ship Workflow child completion fixes in Server 2.3.4

[rmcdaniel]

Delivered

Ships the fixes for durable-workflow/workflow#493 and durable-workflow/workflow#495 in Server 2.3.4 and Helm 0.1.83.

• Pins published Workflow 2.0.8 and its immutable commit in Composer.
• Updates generated release consumers through the existing source-release manifest.
• No Server application code, schema, API, admission policy or wire-format changes. No Cloud deployment.

Verification

• Upstream engine fix and qualification: Fix child completion wake-ups and handled-failure propagation workflow#494.
• Composer downloaded 2.0.8 from Packagist; only the Workflow dependency changed. Composer audit reported no vulnerabilities.
• Local child/parallel tests: 76 tests / 801 assertions, no failures or errors (11 existing PHPUnit deprecations).
• All PR checks passed: feature/source qualification, MySQL HTTP replay/query, MySQL/PostgreSQL rolling upgrades, bounded polling/cache and real kind chart installation. The source-release generator tests passed with PHP available in CI.
• Release run 34234689024 passed image identity, bare-image first run, source-free Compose, protocol catalog and anonymous Helm install.
• Downloaded image index: sha256:5332c57d6baf2194d7bea425496b71896737b261aedaf67323d086cd20450cd0. It contains Server d526bc9 and Workflow 2.0.8 at 12c7e8b88d5d71d5e2273b0d182aa9cf22809590.

Temporary local test containers, network and image are removed. Existing contradictory terminal histories are not automatically rewritten.

[rmcdaniel]

Qualification passed on b585d4d: all required checks green, including feature/source qualification, MySQL replay/query HTTP, MySQL and PostgreSQL predecessor/successor tests, bounded polling/cache checks and a real kind chart installation. The generator test also passed in CI with PHP available; the earlier local failure was a missing host executable, not a product failure.

The lockfile contains only the published Workflow 2.0.8 dependency update plus generated release identities. No Server application or wire-contract changes. Local child/parallel tests against the downloaded package passed (76 tests, 801 assertions).

Proceeding with Server 2.3.4 / Helm 0.1.83 publication, followed by the existing published-image, first-run and anonymous Helm verification. This does not deploy Cloud.