test: add lean4 test suite — 88 tests across 7 patches (CWE-407 + CWE-362)
Unit, integration, and functional complexity gates for lean4-0001..0007.
All 88 tests pass. Complexity gates enforce measured speedups:
lean4-0001: N=2000 fixed <20ms (vs 38ms defective, 34x)
lean4-0002: K=N=1000 fixed <5ms (vs 14ms defective, 678x)
lean4-0003: N=1000 fixed <5ms (vs 20ms defective, 210x)
lean4-0005/0006: concurrent correctness (zero lost jobs/leaked context)
lean4-0007: N=M=500 fixed <1ms (vs O(N*M) defective)
russell@unturf.com
c9314c264b