* refactor(process): own deadlines as one monotonic type with a finalize budget
Deadline (src/domain/deadline) holds a monotonic work budget and a separate finalize budget that starts when finalization begins. ProviderStartupDeadline is built on it and exposes finalize(), so a failed Ghidra startup drains launcher output under its own budget and the caller's signal instead of the expired startup signal. The six wall-clock deadline sums in src move onto Deadline; a counted guard keeps the one page-clock conversion and rejects new copies.
* refactor(process): share one finalize window across repeated beginFinalize calls