Complete SDLC Phase 4: Security audit

[sfloess]

Part of #431: Complete SDLC automation and fix classloader-java API compatibility

Problem

The SDLC continuous workflow was terminated mid-execution during Phase 4 (security audit). This phase was never completed.

Context

• Phases 1-3 completed successfully (code review, testing, PR review)
• Phase 4 was interrupted and needs to be restarted from scratch

Tasks

• Run a full security audit of the platform-java codebase
• Check for dependency vulnerabilities (CVEs in transitive dependencies)
• Audit for common Java security issues (injection, deserialization, etc.)
• Document any findings with severity ratings
• Create issues for any security findings that need remediation

Acceptance Criteria

• Security audit completes fully without interruption
• All findings documented with severity and remediation guidance
• No critical or high severity vulnerabilities remain unaddressed