feat: add --goals, --depth, --breadth flags for DYNAMIC scans

[scthornton]

The scan command accepts --type DYNAMIC but doesn't expose any way to pass attack goals, depth, or breadth. The SDK already supports attack_goals, stream_depth, and stream_breadth in job_metadata - the CLI just doesn't wire them through.

I had to drop to raw node -e calls against the SDK to launch human-augmented agent scans with custom goals. This adds three flags:

• --goals <file> - JSON file or inline JSON array of goal strings
• --depth <n> - max turns per goal (default 10)
• --breadth <n> - parallel agents per goal (default 6)

Without --goals, DYNAMIC scans still run in fully automated mode (no behavior change).

Usage:

# Agent scan with goals from file
airs redteam scan --target <uuid> --name "my-scan" --type DYNAMIC \
  --goals goals.json --depth 10 --breadth 6

# Inline goals
airs redteam scan --target <uuid> --name "my-scan" --type DYNAMIC \
  --goals '["Goal 1", "Goal 2"]'

# Automated (unchanged behavior)
airs redteam scan --target <uuid> --name "my-scan" --type DYNAMIC