[hotfix][runtime-web] Fix savepointPath query parameter in JarService.runJob()

[spuru9]

What is the purpose of the change

JarService.runJob() was appending the programArgs value under the savepointPath query parameter key instead of savepointPath itself. This has had no observable effect because the backend (JarRunHandler) always prefers the value already present in the POST body over the query parameter, but the query parameter itself was wrong and misleading.

Brief change log

• Fix jar.service.ts to append savepointPath (not programArgs) under the savepointPath query key in runJob().

Verifying this change

This change is a trivial rework / code cleanup without any test coverage.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): no
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no

---

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

Generated-by: Claude Code

[flinkbot]

CI report:

• 46bf9cf Azure: SUCCESS

Bot commands

The @flinkbot bot supports the following commands:

• @flinkbot run azure re-run the last Azure build