Soft-delete: is_deleted field added to 8 tables

Indication of whether a record was deleted: Previously, deleted data was deleted from Snowflake. Now, records will no longer be deleted, instead they will be marked as having been deleted in Gong. The is_deleted field was added to the following tables:

• conversations
• conversation_contexts
• conversation_participants
• conversation_trackers
• interaction_stats
• meetings
• emails
• call_recordings