fix(ci): adopt canonical hypatia-scan.yml

[hyperpolymath]

Estate sweep (verisimiser#102 cascade): replace drifted hypatia-scan.yml with the fixed canonical — corrects the env.HOME workdir / old scanner layout drift AND adds pull-requests:write + Comment-step continue-on-error so the advisory PR comment never hard-fails the Hypatia check (hypatia#213). Mechanical, verified green on verisimiser main.

Co-Authored-By: Claude Opus 4.7 (1M context) noreply@anthropic.com

[github-actions]

🔍 Hypatia Security Scan

Findings: 26 issues detected

Severity	Count
🔴 Critical	7
🟠 High	5
🟡 Medium	14

⚠️ Action Required: Critical security issues found!

View findings

[
  {
    "reason": "Issue in quality.yml",
    "type": "missing_workflow",
    "file": "quality.yml",
    "action": "create",
    "rule_module": "workflow_audit",
    "severity": "high"
  },
  {
    "reason": "Admitted leaves proof hole (1 occurrences, CWE-704)",
    "type": "admitted",
    "file": "/home/runner/work/ephapax/ephapax/formal/Semantics.v",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  },
  {
    "reason": "Coq admit tactic leaves goal unproven (2 occurrences, CWE-704)",
    "type": "coq_admit_tactic",
    "file": "/home/runner/work/ephapax/ephapax/formal/Semantics.v",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  },
  {
    "reason": "believe_me undermines formal verification (1 occurrences, CWE-704)",
    "type": "believe_me",
    "file": "/home/runner/work/ephapax/ephapax/src/formal/Ephapax/Formal/RegionLinear.idr",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  },
  {
    "reason": "assert_total bypasses totality checker (1 occurrences, CWE-704)",
    "type": "assert_total",
    "file": "/home/runner/work/ephapax/ephapax/src/formal/Ephapax/Formal/RegionLinear.idr",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "high"
  },
  {
    "reason": "expect() in hot path (1 occurrences, CWE-754)",
    "type": "expect_in_hot_path",
    "file": "/home/runner/work/ephapax/ephapax/src/ephapax-repl/src/lib.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "medium"
  },
  {
    "reason": "from_raw constructs types from raw pointers without safety checks (1 occurrences, CWE-676)",
    "type": "from_raw",
    "file": "/home/runner/work/ephapax/ephapax/src/ephapax-vram-cache/src/lib.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "high"
  },
  {
    "reason": "unwrap() without prior check -- DoS via panic (8 occurrences, CWE-754)",
    "type": "unwrap_without_check",
    "file": "/home/runner/work/ephapax/ephapax/src/ephapax-vram-cache/benches/cache_bench.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "high"
  },
  {
    "reason": "expect() in hot path (5 occurrences, CWE-754)",
    "type": "expect_in_hot_path",
    "file": "/home/runner/work/ephapax/ephapax/src/ephapax-typing/src/lib.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "medium"
  },
  {
    "reason": "unsafe block -- requires SAFETY comment (3 occurrences, CWE-676)",
    "type": "unsafe_block",
    "file": "/home/runner/work/ephapax/ephapax/src/ephapax-interp/src/lib.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "medium"
  }
]

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