Add CEL autocomplete for package metadata hashes and has_package_artifact_hash_mismatch function

[nscuro]

Description

Adds CEL autocomplete for package metadata hashes and has_package_artifact_hash_mismatch function.

Addressed Issue

N/A

Additional Details

API server PR: DependencyTrack/dependency-track#6266
Docs PR: DependencyTrack/docs#128

Checklist

• I have read and understand the contributing guidelines
• This PR introduces new or alters existing behavior, and I have updated the documentation accordingly

[owasp-dt-bot]

✅ Snyk checks have passed. No issues have been found so far.

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[Copilot]

Pull request overview

This PR updates the CEL (Common Expression Language) editor autocomplete metadata for policy expressions by exposing newly added component fields for upstream-reported package artifact hashes and a new CEL member function that detects hash mismatches.

Changes:

• Added package_artifact_{md5,sha1,sha256,sha512} fields to the Component type completions.
• Added component.has_package_artifact_hash_mismatch() to the Component method completions.

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