test(projection): drop denormalized pending-approval-count assertions

Upstream c9b07d6 (pingdotgg#2004) added two ProjectionPipeline tests that assert
on projection_threads.pending_approval_count after runtime projection.
The prerequisite commit ce9f337 (pingdotgg#1973) teaches the pipeline to update
that denormalized column alongside the projection_pending_approvals
table, but MarCode's lazy-hydration design (see FEATURES.md) keeps the
count computed via SQL aggregate at query time and leaves the column
dormant (migration-time backfill only).

Drop the threadRows queries + assertions from both upstream tests and
leave a comment pointing to the architectural divergence. The approval
row assertions (the actual stale/non-stale routing behavior) are
preserved.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: tyulyukov

apps/server/src/orchestration/Layers/ProjectionPipeline.test.ts

@@ -1631,14 +1631,11 @@ it.layer(BaseTestLayer)("OrchestrationProjectionPipeline", (it) => {
         },
       ]);
 
-      const threadRows = yield* sql<{
-        readonly pendingApprovalCount: number;
-      }>`
-        SELECT pending_approval_count AS "pendingApprovalCount"
-        FROM projection_threads
-        WHERE thread_id = 'thread-stale-approval'
-      `;
-      assert.deepEqual(threadRows, [{ pendingApprovalCount: 0 }]);
+      // MarCode's lazy-hydration design (see FEATURES.md) computes
+      // `pendingApprovalCount` on read via SQL aggregate; the
+      // `projection_threads.pending_approval_count` column stays dormant
+      // (updated only by migration-time backfill), so upstream's runtime
+      // assertion on the denormalized column is skipped here.
     }),
   );
 
@@ -1811,14 +1808,10 @@ it.layer(BaseTestLayer)("OrchestrationProjectionPipeline", (it) => {
         },
       ]);
 
-      const threadRows = yield* sql<{
-        readonly pendingApprovalCount: number;
-      }>`
-        SELECT pending_approval_count AS "pendingApprovalCount"
-        FROM projection_threads
-        WHERE thread_id = 'thread-nonstale-approval'
-      `;
-      assert.deepEqual(threadRows, [{ pendingApprovalCount: 1 }]);
+      // See note on the "clears stale pending approvals" test above: MarCode
+      // reads `pendingApprovalCount` via SQL aggregate rather than
+      // maintaining the denormalized `projection_threads.pending_approval_count`
+      // column at runtime, so upstream's runtime assertion is skipped.
     }),
   );