## Description
Adds the account-level `unread_count_for_filters` feature flag as the
dark-launch gate for filtered sidebar unread counts. This reuses the
deprecated `quoted_email_reply` flag slot, resets the reused bit for
existing accounts, and removes stale defaults so new accounts do not
reference the old flag.
This also adds the feature where we are now calculating the unread counts for built in filters like mentions, participating and unattended along with unread count for saved filters/folders.
Closes
[CW-7262](https://linear.app/chatwoot/issue/CW-7262/unread-counts-for-filters-folders)
## Type of change
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality not to work as expected)
- [ ] This change requires a documentation update
* feat: set cache keys for 3 days only
* feat: invalidate should set the latest timestamp
* refactor: cache_keys concern
* remove invalidate_cache method
* refactor reset to set to new value instead of delete
* ensure only one event is dispatched
* feat: set expiry to 24 hours
* chore: make expiry 48 hours
* feat: include destroy event
* feat: set expiry to 72 days
* fix: typo
* test: cache update after `touch`
* test: update cache keys
* refactor: remove after_touch, it's already handled in commit
* fix: Invalidate cache if any of the related objects change
* Add specs:
* Update context
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Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>
