Added an assist sql command for running queries against MSSQL — the missing piece for being able to spelunk through a database without dropping into SSMS or another GUI. Connections are configured up-front (sql set-connection) and stored alongside the existing seq connections, with named selection across calls. sql query runs SELECT statements and prints the result as a table; sql mutate runs INSERT/UPDATE/DELETE/MERGE statements and refuses anything that doesn’t look like a mutation via an isMutation check, so a careless paste of a wide SELECT can’t accidentally tear through a table. Both share the connection resolution, auth, and pool plumbing under src/commands/sql/.

Also slipped in a small fix: assist run add verify:* was creating a claude/commands/<name>.md slash command for every verify run, which doesn’t make sense — verify scripts get invoked by assist verify, not as individual user commands. The slash-command file is now skipped when the run name starts with verify:.