feat(compiler-worker): sesi interaktif PTY untuk playground — Python input() dan C scanf() tanpa EOFError
- session_manager.py: InteractiveSession + SessionManager (PTY Python/C, bounded
output buffer, delta cursor, sweeper, semaphore compile max 2, limit 50 sesi)
- app.py: hybrid — endpoint batch /execute lama dipertahankan + endpoint sesi baru
(POST /sessions, GET delta output, POST input, DELETE stop) + health
- Dockerfile: gunicorn gthread 1 worker/32 thread (registry in-memory aman)
- routes/compile.py: proxy Flask /compile/sessions + anon slot lifecycle + rate limit
- podman-compose.yml: env COMPILER_WORKER_BASE_URL
- tests: test_session_manager.py (baru) + test_app.py + services/tests/test_compile_sessions.py
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