Remove template-only ABI files that falsely implied formal verification

Template Idris2 ABI files (Types.idr, Layout.idr, Foreign.idr) contained
only RSR template scaffolding with unresolved placeholders and no
domain-specific proofs. Removed to prevent false impression of formal
verification coverage.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

PROOF-NEEDS.md

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+# PROOF-NEEDS.md
+
+## Template ABI Cleanup (2026-03-29)
+
+Template ABI removed -- was creating false impression of formal verification.
+The removed files (Types.idr, Layout.idr, Foreign.idr) contained only RSR template
+scaffolding with unresolved {{PROJECT}}/{{AUTHOR}} placeholders and no domain-specific proofs.
+
+When this project needs formal ABI verification, create domain-specific Idris2 proofs
+following the pattern in repos like `typed-wasm`, `proven`, `echidna`, or `boj-server`.

TEST-NEEDS.md

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+# TEST-NEEDS: Cladistics.jl
+
+## Current State
+
+| Category | Count | Details |
+|----------|-------|---------|
+| **Source modules** | 2 | 1,197 lines |
+| **Test files** | 1 | 606 lines, 161 @test/@testset |
+| **Benchmarks** | 0 | None |
+
+## What's Missing
+
+- [ ] **Performance**: No benchmarks for phylogenetic tree computation
+- [ ] **Error handling**: No tests for malformed taxa, cyclic trees
+
+## FLAGGED ISSUES
+- **161 tests for 2 modules = 80.5 tests/module** -- excellent
+- **0 benchmarks** -- tree algorithms should have scaling benchmarks
+
+## Priority: P3 (LOW)
+
+## FAKE-FUZZ ALERT
+
+- `tests/fuzz/placeholder.txt` is a scorecard placeholder inherited from rsr-template-repo — it does NOT provide real fuzz testing
+- Replace with an actual fuzz harness (see rsr-template-repo/tests/fuzz/README.adoc) or remove the file
+- Priority: P2 — creates false impression of fuzz coverage