This is the first PR of a few for moving connection events out of the audit log, and into a new database table and web UI page called the 'Connection Log'.

This PR:

• Creates the new table
• Adds and tests queries for inserting and reading, including reading with an RBAC filter.
• Implements the corresponding RBAC changes, such that anyone who can view the audit log can read from the table
• Implements, under the enterprise package, aConnectionLogger abstraction to replace theAuditor abstraction for these logs. (No-op'd in AGPL, like theAuditor)
• Routes SSH connection and Workspace App events into the newConnectionLogger
• Updates all existing tests to check the values of theConnectionLogger instead of theAuditor.

Future PRs:

• Add filtering to the query
• Add an enterprise endpoint to query the new table
• Write a query to move N entries from the audit logs table to the connection logs table, call it fromdbpurge.
• Implement a table in the Web UI for viewing connection logs.