Improve CLI runtime status monitoring

[danieldear]

Summary

• add agent007 status --state filters for all/active/blocked/failed/complete sessions
• add agent007 status --watch [seconds] for compact terminal monitoring
• show generated timestamp, shown count, runtime mode/provider column, and clearer filtered-empty state
• update M4 milestone docs for the shipped CLI status watch/filter slice

Validation

• cargo fmt --all -- --check
• cargo check -p agent007
• cargo test -p agent007 runtime_status -- --nocapture
• cargo test -p agent007 parse_status -- --nocapture
• ./target/debug/agent007 status --state active --limit 3

Deferred

• full interactive TUI run detail
• terminal approval queue actions
• retry/control actions

[Copilot]

Pull request overview

This PR improves agent007 status as a lightweight terminal monitoring surface for runtime sessions, aligning CLI visibility with the broader M4 runtime/operator UX milestone.

Changes:

• Adds --state filtering and --watch [seconds] refresh mode to CLI status.
• Expands compact status output with generated timestamp, shown count, and runtime/provider column.
• Updates milestone docs to reflect the shipped CLI status watch/filter slice.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
crates/cli/src/commands/runtime_status.rs	Implements status filters, watch mode, updated compact output, and related tests.
crates/cli/src/main.rs	Updates CLI parsing tests for new status arguments.
docs/runtime-and-tui-milestone.md	Documents the current CLI status filtering/watch slice in M4 planning.
docs/milestones.md	Adds CLI status watch/filter to the M4 milestone feature list.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.