pi-processes v0.7.0

80f81ff: perf: replace polling timers with event-driven output rendering
a8965ad: Add runtime log watch alerts for managed processes.
- New logWatches option on process tool start action
- Watches match log lines on stdout, stderr, or both
- Default one-time behavior (repeat: false), with optional repeat mode
- On watch match, emit visible UI event and trigger an immediate agent turn
- Invalid watch config (including bad regex patterns) now fails fast at start time
2f33586: Process lookup now uses exact ID matching only. Fuzzy name/command matching via find() has been removed. The id parameter in tool actions accepts only the process ID returned by start and list. The /ps list UI merges the ID and Name columns into a single “Process” column showing name (id).