feat(dvm): dispatch pending DVM jobs to worker processes

[Priyanshubhartistm]

Description

Adds dispatch for pending NIP-90 DVM job requests. DvmOrchestratorWorker now spawns one long-lived
worker process per configured dvm.workers[i] entry and multiplexes every in-flight job over that process's stdin/stdout as newline-delimited JSON:

• Polls DvmJobRepository.findPendingJobs() every 2s and assigns a job via the existing atomic
  assignWorker().
• Sends the job's id/kind/pubkey/tags/content as one JSON line on the worker's stdin.
• Correlates the worker's { id, content } reply back to the pending job by id.
• On timeout: marks the job timed_out and kills the worker process (any other jobs still in flight on it fail as a side effect; the worker is respawned lazily on the next poll tick).
• On success: marks the job completed and publishes a kind 6000-6999 result event, signed by the relay's own derived keypair (same self-signing pattern already used for invoice notifications in payments-service.ts dvm.workers[] has no per-worker signing key).
• On worker crash/unexpected exit: marks every job still in flight on that worker failed.

spawnWorkerProcess() is a new helper (in process.ts) for this a persistent-process counterpart to the existing one-shot runCommand/runCommandWithOutput (same spawn/error classification conventions: not found/permission-denied/spawn-error), framing messages both ways as newline-delimited JSON since the one-shot helpers buffer all output into a single string, which doesn't work once more than one job can be in flight against the same worker at a time.

Related Issue

Part of #639. Closes #731.

Motivation and Context

Job requests (#729) and job persistence (#727) exist, but nothing hands a submitted job off to a worker process yet. This is the last piece of Month 1's core job-routing pipeline (worker registry → persistence → ingestion → dispatch).

[changeset-bot]

🦋 Changeset detected

Latest commit: f3c8049

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
nostream	Minor

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[coveralls]

Coverage is 71.226% — Priyanshubhartistm:feat/dvm-job-dispatch into cameri:main. No base build found for cameri:main.

[Copilot]

Pull request overview

Adds the missing “dispatch” stage for NIP-90 DVM jobs: polling persisted submitted jobs, sending them to long-lived worker processes over stdin/stdout as newline-delimited JSON, and publishing signed kind 6000–6999 result events back through the relay.

Changes:

• Introduces spawnWorkerProcess() for persistent NDJSON IPC with worker processes (stdin/stdout multiplexing).
• Extends DvmOrchestratorWorker to poll/assign jobs, manage in-flight tracking + timeouts, and publish result events.
• Extends DvmJobRepository.findPendingJobs() to optionally filter by kinds, and adds/updates unit tests for the new dispatch flow.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
test/unit/repositories/dvm-job-repository.spec.ts	Updates pending-job tests for new kinds filter parameter and adds filter coverage.
test/unit/cli/process.spec.ts	Adds unit tests for spawnWorkerProcess() NDJSON framing and spawn error classification.
test/unit/app/dvm-orchestrator-worker.spec.ts	Adds unit tests for dispatch lifecycle: assign race, missing source event, success publish, timeout, crash, respawn, and reentrancy guard.
src/repositories/dvm-job-repository.ts	Adds optional kinds filtering to pending-job query.
src/factories/dvm-orchestrator-worker-factory.ts	Wires DB clients + repositories into DvmOrchestratorWorker.
src/constants/base.ts	Adds DVM job result kind range constants (6000–6999).
src/cli/utils/process.ts	Adds spawnWorkerProcess() helper for long-lived worker IPC over NDJSON.
src/app/dvm-orchestrator-worker.ts	Implements dispatch loop, worker lifecycle handling, timeouts, and result event publishing.
src/@types/repositories.ts	Updates IDvmJobRepository.findPendingJobs() signature to accept optional kinds.
.changeset/dvm-job-dispatch.md	Declares a minor release for DVM job dispatch + result publishing.

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