actop 1.6.5

Added

• --json --samples N — bounded NDJSON emission for agent/script one-shots.
  --json previously streamed until interrupted, forcing an agent or script to
  kill the process after reading its record. --samples N (with --json) now
  emits exactly N snapshot records then exits 0; --samples 0 (default)
  keeps the streaming behavior. The first record already carries real deltas
  (the Monitor primes the baseline at construction), so --json --samples 1
  is a clean single-snapshot tool call.