feat(standards): add ARG + FRG language-maturation framework

[hyperpolymath]

Summary

Adds two sibling-tier standards to the existing TRG/CRG family, completing the four-axis language-maturation grading framework.

• ARG (Adoption Readiness Grades) at adoption-readiness-grades/ — real-world adoption readiness: community, ergonomics, tooling polish, docs, deployment story
• FRG (Foundations Readiness Grades) at foundations-readiness-grades/ — foundational research surfaces: mechanised proofs, papers, verification harnesses, formal artefacts

Estate grade vocabulary X | F | E | D | C | B | A with worst-of aggregation.

Cross-axis rule: ARG <= TRG always; ARG-A requires FRG >= B.

Includes audit findings doc AUDIT-FINDINGS-2026-05-28.adoc with §7 prover-CI hygiene addendum and §7.5 calibration lessons (~67% sub-agent false-positive rate on the 2026-05-28 sweep).

What's in each subtree

adoption-readiness-grades/ (ARG):

• ADOPTION-READINESS-GRADES.adoc — normative spec
• ADOPTION-READINESS-GRADES.a2ml — machine-readable counterpart
• README.adoc — entry point
• SELF-ASSESSMENT.adoc — self-grade for the standards repo
• AUDIT-FINDINGS-2026-05-28.adoc — 2026-05-28 audit
• templates/ARG-PROFILE-TEMPLATE.adoc — per-language profile template

foundations-readiness-grades/ (FRG): same shape, no audit doc.

Follow-ups (separate PRs)

• affinescript: per-language ARG/FRG profile
• ephapax: per-language ARG/FRG profile
• my-lang: per-language ARG/FRG profile
• nextgen-languages: dashboard + tracker wiring (TOOLING-STATUS.adoc + language-status-tracker.jl)

Test plan

• CI passes
• .adoc + .a2ml render cleanly
• No SPDX-header lint complaints

🤖 Generated with Claude Code

[github-actions]

🔍 Hypatia Security Scan

Findings: 196 issues detected

Severity	Count
🔴 Critical	65
🟠 High	39
🟡 Medium	92

⚠️ Action Required: Critical security issues found!

View findings

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