[datlechin]

Summary

• Server Dashboard covers Oracle, MongoDB and Redis.
• Oracle: sessions from V$SESSION with text from V$SQL; metrics from V$SYSMETRIC, or V$CON_SYSMETRIC in a pluggable database, and V$INSTANCE; slow queries are active calls over a second. Terminate: ALTER SYSTEM KILL SESSION 'sid,serial#' IMMEDIATE. Cancel: ALTER SYSTEM CANCEL SQL, 18c and later.
• MongoDB: operations from currentOp (own operations only without inprog), metrics from serverStatus, slow queries from the browsed database's system.profile. Cancel: killOp. No Terminate.
• New DatabaseDriver.executeRead: dashboard reads run read-only, so a shell global an earlier MongoDB statement redefined cannot write.
• Redis: clients from CLIENT LIST minus the dashboard's CLIENT ID, metrics from INFO, slow queries from SLOWLOG GET 20. Terminate: CLIENT KILL ID. Cancel: CLIENT UNBLOCK … ERROR, for a blocked client on 5.0 and later.
• Redis driver: SLOWLOG GET returns a grid. OUTSIDEBLOCK <command> is held back, not queued, while the user's MULTI block is open; the dashboard sends every command that way. slowlog|get joins the curated cluster routing table.
• Query classifier reads past OUTSIDEBLOCK as it reads past DB <n>, so OUTSIDEBLOCK FLUSHALL stays destructive.
• MCP: get_server_dashboard (tools:read) now reads these three engines, and stop_server_session (tools:write, user approval) can cancel or kill a session on them. The tool description drops its engine list.
• Tests changed on purpose: ServerDashboardViewModelTests.redisHasNoDashboard is replaced, and DashboardProviderSQLTests.callerExclusions gains the three engines' self-exclusion markers.

Not in this PR

• Redis Cluster lists one primary's clients and metrics, the node keyless commands go to. Every node's clients need node addressing in the driver's console syntax.
• The session grid has no client address or application column for any engine, so Redis addr and name are not shown.

Test plan

• New suites: OracleDashboardProviderTests, MongoDBDashboardProviderTests, RedisDashboardProviderTests, RedisDashboardCommandTests (held back inside a MULTI block), plus classifier, routing, RedisServerInfo and duration cases.
• Oracle 23.26 Free, PDB and root, by hand: every statement, CANCEL SQL (victim gets ORA-01013, stays connected), KILL SESSION (ORA-03113).
• MongoDB 8.3 in mongosh: the three statements (own currentOp, server threads and monitoring hello left out), killOp interrupts a running find.
• Redis 8.10: CLIENT LIST, SLOWLOG GET, CLIENT UNBLOCK on a BLPOP; check-redis-command-routing.sh passes.

Fixes #3609