[datlechin]

Summary

• Server Dashboard now covers Oracle, MongoDB and Redis.
• Oracle: sessions from V$SESSION with the statement from V$SQL, metrics from V$SYSMETRIC (or V$CON_SYSMETRIC in a pluggable database) and V$INSTANCE, slow queries as active calls over a second. Terminate is ALTER SYSTEM KILL SESSION 'sid,serial#' IMMEDIATE; Cancel is ALTER SYSTEM CANCEL SQL from 18c.
• MongoDB: operations from currentOp (own operations only without inprog), metrics from serverStatus, slow queries from the browsed database's system.profile. Cancel is killOp; there is no Terminate.
• MongoDB dashboard reads go through a new DatabaseDriver.executeRead, which runs the script read-only, so a shell function an earlier statement redefined cannot write.
• Redis: clients from CLIENT LIST minus the dashboard's own CLIENT ID, metrics from INFO, slow queries from SLOWLOG GET 20. Terminate is CLIENT KILL ID; Cancel is CLIENT UNBLOCK … ERROR for a blocked client.
• Redis driver: SLOWLOG GET returns a grid (id, time, duration, quoted command, client, name). OUTSIDEBLOCK <command> runs a server command held back, not queued, while the user's MULTI block is open; every dashboard command uses it. slowlog|get joins the curated cluster routing table so Redis 6 clusters fan it out too.
• The query classifier reads past OUTSIDEBLOCK the way it reads past DB <n>, so OUTSIDEBLOCK FLUSHALL stays destructive.
• MCP: get_server_dashboard and stop_server_session now work on the three engines. A paired client with tools:read can read their sessions, metrics and slow queries; with tools:write and the user's approval it can cancel or kill a session there. The tool description no longer lists engines.
• DurationFormatting gains a sub-second form for slow log durations.
• Tests changed on purpose: ServerDashboardViewModelTests.redisHasNoDashboard is replaced (Redis now has a dashboard), and DashboardProviderSQLTests.callerExclusions names how the three new engines leave out their own session.

Test plan

• New: OracleDashboardProviderTests, MongoDBDashboardProviderTests, RedisDashboardProviderTests, RedisDashboardCommandTests (parser, slow log grid, held back inside a MULTI block), the OUTSIDEBLOCK classifier case, the slowlog|get routing case, RedisServerInfo whole-name reads.
• Oracle SQL run by hand on Oracle 23.26 Free, in FREEPDB1 and in the root: sessions with statement text, both metric views, uptime, CANCEL SQL (ORA-01013 in the victim, session kept) and KILL SESSION (ORA-03113).
• MongoDB server commands run by hand on 8.3: own operation, server threads and monitoring hello left out; profiler entries listed.
• Redis on 8.10: CLIENT LIST, SLOWLOG GET shape, CLIENT UNBLOCK on a BLPOP, and apple/scripts/probes/check-redis-command-routing.sh against the curated table.

Fixes #3609