Introduces a new `command_usage_counters` table to track how many times specific commands are used between two users.
- Adds `_ensure_usage_table_exists` to create the table if it doesn't exist.
- Implements `_increment_usage_counter` to update or insert usage counts.
- Adds `_get_usage_count` to retrieve usage counts.
- Integrates usage tracking into the `molest` command (both slash and legacy).
- Adds logging for database operations related to usage tracking.
