chore(license): migrate to MPL-2.0

[hyperpolymath]

Summary

Migrates this repo's license declaration from PMPL-1.0-or-later to MPL-2.0.

Rationale: solo.

Changes

• LICENSE file replaced with canonical MPL-2.0 text (including SPDX header).
• Package metadata updated where present (Cargo.toml, package.json, deno.json, mix.exs, pyproject.toml).

Part of estate-wide metadata cleanup 2026-05-26.

[github-actions]

🔍 Hypatia Security Scan

Findings: 67 issues detected

Severity	Count
🔴 Critical	7
🟠 High	12
🟡 Medium	48

⚠️ Action Required: Critical security issues found!

View findings

[
  {
    "reason": "Stray AI.a2ml in root -- use 0-AI-MANIFEST.a2ml only",
    "type": "banned",
    "file": "AI.a2ml",
    "action": "delete",
    "rule_module": "root_hygiene",
    "severity": "high"
  },
  {
    "reason": "Superseded by 0-AI-MANIFEST.a2ml",
    "type": "banned",
    "file": "AI.djot",
    "action": "delete",
    "rule_module": "root_hygiene",
    "severity": "high"
  },
  {
    "reason": "No test directory or test files found",
    "type": "no_tests",
    "file": "/home/runner/work/absolute-zero/absolute-zero",
    "action": "flag",
    "rule_module": "honest_completion",
    "severity": "high",
    "deduction": 20
  },
  {
    "reason": "Action hyperpolymath/standards/.github/workflows/governance-reusable.yml@main needs attention",
    "type": "unpinned_action",
    "file": "governance.yml",
    "action": "pin_sha",
    "rule_module": "workflow_audit",
    "severity": "high"
  },
  {
    "reason": "Action actions/checkout@v6.0.2 needs attention",
    "type": "unpinned_action",
    "file": "jekyll-gh-pages.yml",
    "action": "pin_sha",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Action actions/configure-pages@v6 needs attention",
    "type": "unpinned_action",
    "file": "jekyll-gh-pages.yml",
    "action": "pin_sha",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Action actions/jekyll-build-pages@v1 needs attention",
    "type": "unpinned_action",
    "file": "jekyll-gh-pages.yml",
    "action": "pin_sha",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Action actions/upload-pages-artifact@v5 needs attention",
    "type": "unpinned_action",
    "file": "jekyll-gh-pages.yml",
    "action": "pin_sha",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Action actions/deploy-pages@v5 needs attention",
    "type": "unpinned_action",
    "file": "jekyll-gh-pages.yml",
    "action": "pin_sha",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Action actions/checkout@v6.0.2 needs attention",
    "type": "unpinned_action",
    "file": "language-policy.yml",
    "action": "pin_sha",
    "rule_module": "workflow_audit",
    "severity": "medium"
  }
]

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