fix(status-gate): correct stale all-target test count 467 -> 486

Ground-truthed via `cargo test --all-targets -- --list | grep ': test$' | wc -l`
= 486 on current main; TEST-NEEDS.md claimed 467 (drifted by 19). This is the
second marker scripts/status-gate.sh reads — with it corrected, the now-wired
status-gate passes on both its assertions (proof-count 5=5 from #300/#301,
test-count 486=486 here), so the gate is green at source rather than red.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

TEST-NEEDS.md

@@ -15,8 +15,8 @@
 - Contract/invariant tests: `src/ephapax-cli/tests/contract_tests.rs` (type system invariants, 13 tests)
 - Aspect tests: `src/ephapax-cli/tests/aspect_tests.rs` (security, performance, correctness, 13 tests)
 - Benchmarks: `src/ephapax-parser/benches/parse_bench.rs`, `src/ephapax-vram-cache/benches/cache_bench.rs`
-- Total: **467 tests pass / 0 fail** (`cargo test --workspace --all-targets`)
-- Documented all-target tests: 467
+- Total: **486 tests** (`cargo test --workspace --all-targets`); pass/fail enforced by `rust-ci.yml`
+- Documented all-target tests: 486
 
 ## CRG Testing Taxonomy — Status