test(driver-memory): the analytics face's declared-operator probe covers $icontains (#6520)

`memory-driver-filter-logic-conformance.test.ts` keys its probe map by the
face's OWN declared vocabulary and fails when a declared operator has no probe —
so adding `$icontains` to `MONGO_TO_CUBE_OPERATOR` correctly turned it red.
That gate is the reason #5374 cannot recur, and it fired exactly as designed.

The comparand is UPPER-case ('BET') against a lower-case fixture row ('beta'),
so the probe only selects a row once the ASCII fold actually runs. A lower-case
comparand would have been discriminating too and would have agreed across the
two faces for free even if neither folded — the free-agreement certification
that block's own header warns against.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PiRUoQkTSBBmpyXBY3cVn2

Author: claude

packages/drivers/driver-memory/src/memory-driver-filter-logic-conformance.test.ts

@@ -587,6 +587,12 @@ const DECLARED_OPERATOR_PROBES: Record<string, FilterCondition> = {
   $nin: { code: { $nin: ['100'] } } as FilterCondition,
   $contains: { name: { $contains: 'et' } } as FilterCondition,
   $notContains: { name: { $notContains: 'et' } } as FilterCondition,
+  // [#6520] The comparand is deliberately UPPER-case against a lower-case
+  // fixture (`beta`), so the probe only selects row 2 once the ASCII fold
+  // actually runs. `'et'` would have been discriminating too, and would have
+  // agreed for free on a face that never folded — which is the certification
+  // this block's own header warns against.
+  $icontains: { name: { $icontains: 'BET' } } as FilterCondition,
   $exists: { closed_at: { $exists: false } } as FilterCondition,
 };