Add parse-server user endpoint disclosure advisory references

[cookesan]

Adds parse-server user endpoint disclosure advisory references to GHSA-75v4-m273-5j49.

Audit refresh, July 8, 2026:

• Confirmed the live PR is open, ready for review, merge-clean, and the visible advisory check is green.
• Rechecked the merge-base diff: exactly one advisory JSON file changes (advisories/github-reviewed/2026/06/GHSA-75v4-m273-5j49/GHSA-75v4-m273-5j49.json), JSON parses, git diff --check passes, and the exact-head worktree is clean.
• Revalidated the added public references in the diff; all resolve through their source site or registry.

[cookesan]

Rechecked this reference-only PR while keeping the open Advisory Database queue current.

Adds direct commit and release references for GHSA-75v4-m273-5j49. The advisory already references NVD, upstream PR #10492, and package source; this PR links the merged fix to its fixed release.

Current audit, July 8, 2026:

• GHSA-75v4-m273-5j49 is live and not withdrawn.
• CVE-2026-53725 resolves in NVD with Deferred status.
• PR #10492 merged to alpha as commit 83e90edbe4224c81172a20e40fa986662c9394ca.
• Release 9.9.1-alpha.5 is published, marked prerelease, and not marked draft.
• npm parse-server 9.9.1-alpha.5 resolves with package tarball and integrity metadata.
• Local JSON validation and whitespace checks pass, and the diff only changes this advisory.

No advisory data fields are changed.