gplazma2-oidc: Add and test support for storage.poll WLCG claim

[greenc-FNAL]

Motivation:

JWT Profiles 1.2 describes a new claim, storage.poll intended for obtaining online/nearline status of files without requiring full read access. We wish to add support for that claim.

Modification:

• POLL("storage.poll", true, READ_METADATA) is added to WlcgProfileScope.
• Unit tests are added to WlcgProfileScopeTest.java.

Result:

READ_METADATA operations are authorized for requestors without read access if the requestor provides a token with the storage.poll claim.

Target: master
Request: 11.2
Patch: https://rb.dcache.org/r/14675/diff/raw/
Closes:
Requires-notes: yes
Requires-book: no
Acked-by:

• Tigran Mkrtchyan
• Dmitry Litvintsev

[Copilot]

Pull request overview

Adds support in the gplazma2-oidc WLCG profile scope parsing/authorization logic for the storage.poll scope described in WLCG JWT Profiles 1.2, enabling metadata/status queries without granting read/download permissions.

Changes:

• Add POLL("storage.poll", true, READ_METADATA) to WlcgProfileScope.Operation.
• Improve the “missing path” validation message to include the operation label.
• Add unit tests covering identification, parsing, and invalid forms of storage.poll.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
modules/gplazma2-oidc/src/main/java/org/dcache/gplazma/oidc/profiles/WlcgProfileScope.java	Introduces the new storage.poll operation (mapping to READ_METADATA) and clarifies the error message when a required path is missing.
modules/gplazma2-oidc/src/test/java/org/dcache/gplazma/oidc/profiles/WlcgProfileScopeTest.java	Adds test coverage for recognizing and parsing storage.poll scopes, plus validation of invalid/relative-path variants.