Improve client

[sb10]

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[Copilot]

Pull request overview

This PR expands the Go client.Scheduler API to support “no-shell” job submission and monitoring workflows (submit + get stable job keys, submit + wait, wait by keys, get status by key, wait for running), while preserving existing SubmitJobs behavior and pretend-submission support.

Changes:

• Added higher-level Scheduler methods (SubmitJobsAndReturnIDs, SubmitJobsAndWait, WaitForJobs, GetJobByKey, WaitForRunning) plus SubmitJobsOptions and exported ErrDuplicateJobs.
• Updated job environment handling to distinguish “absent stored env” vs “explicitly empty stored env”, with new tests.
• Added extensive client tests, compile-only compatibility tests, and package examples + design/spec docs for the new API.

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
jobqueue/jobqueue_test.go	Adjusts an env-related test to align with new nil-vs-empty env semantics.
jobqueue/job.go	Updates Job.Env() semantics to treat nil env as “fallback to current env” while preserving explicit empty env.
jobqueue/job_test.go	Adds coverage for distinguishing absent vs explicitly empty stored environments.
client/client.go	Introduces the new high-level Scheduler API methods/options and pretend-mode support for them.
client/client_test.go	Adds comprehensive integration + pretend-mode tests for new Scheduler API behavior.
client/client_compat_test.go	Compile-only tests to ensure existing downstream Scheduler usage continues to build unchanged.
client/example_test.go	Adds compilable usage examples demonstrating the new no-shell API.
.docs/nowrap/*	Adds specification, prompts, and phased implementation notes documenting the feature.

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[Copilot]

Pull request overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated 4 comments.