refactor(agent): remove legacy in-process backend, rename harnesses pi_core/pi_agenta - #4833

    5 files  ±0     59 suites  ±0   3s ⏱️ ±0s
1 077 tests ±0  1 077 ✅ ±0  0 💤 ±0  0 ❌ ±0 
1 079 runs  ±0  1 079 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 3cb0a64. ± Comparison against earlier commit 0e71bd0.