docs: seed docs/proof-debt.md per trusted-base policy

[hyperpolymath]

Summary

• Seeds docs/proof-debt.md enumerating the 3 known Admitteds in formal/Semantics.v (lines 4924, 5983, 6572) and their planned discharge.
• Follows the schema defined by standards#203 (trusted-base reduction policy).
• Closes part of Item-3 follow-up of the 2026-05-26 estate tech-debt audit.

Entries (§(d) DEBT)

File:line	Lemma	Plan
formal/Semantics.v:4924	inside step_preserves_type	Discharge per project_ephapax_preservation_closure_plan (6-9 day plan, deadline 2026-09-01)
formal/Semantics.v:5983	inside step_output_context_eq	Corollary of the strengthened step_preserves_type
formal/Semantics.v:6572	inside preservation (top-level theorem)	Lands automatically once the two feeder lemmas close

What this PR does NOT do

Discharge the proofs. That's separate, multi-PR work owned by the closure plan. This PR just makes the debt visible in the agreed schema so it's countable and so the future scripts/check-trusted-base.sh CI gate has something to validate against.

Companion

• standards#195 — estate proof-debt audit (the empirical motivation)
• standards#203 — trusted-base reduction policy (the schema)

🤖 Generated with Claude Code

[github-actions]

🔍 Hypatia Security Scan

Findings: 31 issues detected

Severity	Count
🔴 Critical	7
🟠 High	8
🟡 Medium	16

⚠️ Action Required: Critical security issues found!

View findings

[
  {
    "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": "Admitted leaves proof hole (5 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 (6 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": "User-defined Coq axiom -- not verified by kernel (2 occurrences, CWE-704)",
    "type": "coq_axiom",
    "file": "/home/runner/work/ephapax/ephapax/formal/Semantics.v",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "medium"
  },
  {
    "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": "unwrap_or(0) with dangerous default (2 occurrences, CWE-754)",
    "type": "unwrap_dangerous_default",
    "file": "/home/runner/work/ephapax/ephapax/lib/linter.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  },
  {
    "reason": "expect() in hot path (2 occurrences, CWE-754)",
    "type": "expect_in_hot_path",
    "file": "/home/runner/work/ephapax/ephapax/src/ephapax-wasm/src/debug.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "medium"
  },
  {
    "reason": "unwrap_or(0) with dangerous default (1 occurrences, CWE-754)",
    "type": "unwrap_dangerous_default",
    "file": "/home/runner/work/ephapax/ephapax/src/ephapax-wasm/src/lib.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  },
  {
    "reason": "expect() in hot path (1 occurrences, CWE-754)",
    "type": "expect_in_hot_path",
    "file": "/home/runner/work/ephapax/ephapax/src/ephapax-package/src/manifest.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "medium"
  }
]

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