contain unexpected validator, checkpoint, or device-specific failures inside one Web Push delivery job
await every started device job before releasing the global dispatch lease
preserve failed revisions for retry while checkpointing healthy sibling deliveries
Verification
RED: focused regression failed because a competing worker acquired the lease while a healthy sibling was still active
GREEN: focused regression passed
focused: 42 passed
full: 1312 passed
Closes #655
## What changed
- contain unexpected validator, checkpoint, or device-specific failures inside one Web Push delivery job
- await every started device job before releasing the global dispatch lease
- preserve failed revisions for retry while checkpointing healthy sibling deliveries
## Verification
- RED: focused regression failed because a competing worker acquired the lease while a healthy sibling was still active
- GREEN: focused regression passed
- focused: `42 passed`
- full: `1312 passed`
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Closes #655
What changed
Verification
42 passed1312 passed