[M4] Best-Effort Collection on Abort

[miciav]

Description

Ensure logs are collected even on abort/stop.

Files to modify

• lb_controller/controller_playbooks.py
• lb_controller/controller.py

Key changes

• Run collection in finally block
• Ignore collection errors on abort
• Log collection status

Acceptance criteria

• Logs collected on Ctrl+C
• Logs collected on failure
• Collection errors don't mask original error

Milestone: M4 - Log Collection Enhancement
Issue: 4.2

[miciav]

Collect runs in finally with errors ignored in lb_controller/adapters/playbooks.py.