chore(lsp): mark ABACUS readiness from runtime evidence

[newtontech]

Summary

• mark ABACUS diagnostic readiness as partial with passing agent CLI smoke
• update the LSP compatibility matrix for ABACUS closed-loop readiness
• update the maturity audit note now that INPUT/STRU/KPT runtime diagnostics and fix previews are wired

Test Plan

• npm run typecheck
• npm run test:unit -- --coverage=false --runTestsByPath tests/unit/lsp/registry.test.ts tests/unit/lsp/bohriumRegistryAlignment.test.ts
• npm run lsp:check-family -- --strict --report-path /tmp/lsp-family-report-20260615-007-abacus-readiness.json
• npm run lsp:check-latest -- --fail-on-drift
• npm run lsp:check-bohrium-registry -- --strict --bohrium-registry /Users/yhm/Desktop/code/.worktrees-lsp-latest/bohrium_skills/bohrium_skills/lsp-skills/references/lsp_backends.yaml
• python3 /Users/yhm/Desktop/code/.worktrees-lsp-latest/bohrium_skills/bohrium_skills/lsp-skills/scripts/lsp_skill_probe.py --root /Users/yhm/Desktop/code/.worktrees-lsp-latest --json

No-test justification

Registry metadata-only readiness update; existing registry and Bohrium alignment tests cover the contract, and no OpenQC runtime parser/editor behavior was changed.

Fixes #212
Refs newtontech/abacus-lsp#70
Refs newtontech/abacus-lsp#72