docs(issues): create ISSUES.md from deferred items and codebase concerns
11 tracked issues from STATE.md deferred items + CONCERNS.md analysis:
- ISS-001: MachineFingerprint null dereference (High, Quick)
- ISS-002: Blocking async .GetAwaiter().GetResult() (Medium, Medium)
- ISS-003: Silent catch {} blocks (High, Quick-Medium)
- ISS-004: No structured logging framework (Medium, Substantial)
- ISS-005: SHA256 not disposed (Low, Quick)
- ISS-006: LSV2 connect timeout doesn't abort (Medium, Quick)
- ISS-007: Integration tests hardcoded IPs (Medium, Quick-Medium)
- ISS-008: MachineFingerprint untested on real hardware (High, Medium)
- ISS-009: Heidenhain ReadActiveProgram not implemented (Low, Substantial)
- ISS-010: Siemens ReadActiveProgram not implemented (Low, Substantial)
- ISS-011: Obsolete crypto APIs (Low, Quick when upgrading)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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