pyffmpegcore v0.3.1

PyFFmpegCore v0.3.1: bounded batch execution

PyFFmpegCore remains a local-first beta. FFmpeg and FFprobe stay explicit
system dependencies. This patch fixes per-job timeout behavior for the Python
batch API and rejects non-finite timeout values.

What changed

• BatchRunner.run(..., policy=BatchPolicy(per_job_timeout_seconds=...)) now
  passes the configured deadline into every job's execution plan.
• Direct execution and batch policies reject NaN and infinite timeouts instead
  of silently running without an effective deadline.

Verification

• Exact release artifact checks on Linux, macOS, and Windows with Python 3.10
  and 3.14: release workflow
• Batch timeout behavior
• Compatibility policy
• Full changelog

Timeouts bound how long the managed process runner waits. They do not sandbox
untrusted media or guarantee that external child processes have no side effects.

Full Changelog: v0.3.0...v0.3.1