Wrap remaining securityAdvisories endpoints (4 missing of 10)

[ldraney]

Parent Issue

#86 — Expand Octokit coverage

Category: securityAdvisories

File: src/tools/categories/securityAdvisories.ts
Current: 6/10

Already Wrapped

listGlobalAdvisories, getGlobalAdvisory, listRepositoryAdvisories, getRepositoryAdvisory, createRepositoryAdvisory, updateRepositoryAdvisory

Methods to Add (4)

Method	Route
createFork	POST /repos/{owner}/{repo}/security-advisories/{ghsa_id}/forks
createPrivateVulnerabilityReport	POST /repos/{owner}/{repo}/security-advisories/reports
createRepositoryAdvisoryCveRequest	POST /repos/{owner}/{repo}/security-advisories/{ghsa_id}/cve
listOrgRepositoryAdvisories	GET /orgs/{org}/security-advisories

Pattern

See src/tools/categories/git.ts. Tool name: github_security_advisories_<snake_case_method>.

Acceptance Criteria

• All 4 missing methods wrapped
• npm run build passes
• TOOLS.md updated