[FEATURE]: Snapshot lifespan ought be configurable.

[ariane-emory]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

A couple of comments I exchanged with @rekram1-node in #10532 inspired a thought: the lifespan of snapshots ought to be configurable by the user, instead of being a fixed 7 days.

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• HUGE snapshot folder #6845: HUGE snapshot folder - User experienced 169GB of snapshot accumulation, showing the real-world impact of fixed retention policies
• OpenCode nuked my storage (318 GB added) #9290: OpenCode nuked my storage (318 GB added) - Comprehensive analysis of snapshot system issues including orphaned temp files and lack of storage limits
• [BUG] Snapshot module ignores 'watcher.ignore' config, causing excessive disk usage and performance degradation #8887: [BUG] Snapshot module ignores 'watcher.ignore' config, causing excessive disk usage and performance degradation - Related storage management issue

Feel free to ignore if none of these address your specific case.