test: align events-limit test with tail semantics

The /events limit test still asserted the oldest event (seq 1) after 18cbd34 deliberately switched the no-fromSeq path to return the tail (so a pending approval at the tail stays visible to a headless operator). Expect the tail (seq 3) and add a post-filter tail assertion (seq 2) so the test actually verifies truncate-after-filter.

apps/server/src/test/kotlin/com/correx/apps/server/routes/EventInspectRoutesTest.kt

@@ -268,7 +268,10 @@ class EventInspectRoutesTest {
             assertEquals(HttpStatusCode.OK, response.status)
             val array = testJson.parseToJsonElement(response.bodyAsText()) as JsonArray
             assertEquals(1, array.size)
-            assertEquals(1L, (array[0] as JsonObject)["sequence"]!!.jsonPrimitive.content.toLong())
+            // Tail semantics: limit with no fromSeq returns the most recent events, so seq 3 (the
+            // last seeded event), not the oldest. A pending approval lives at the tail — this is the
+            // behaviour a headless operator needs.
+            assertEquals(3L, (array[0] as JsonObject)["sequence"]!!.jsonPrimitive.content.toLong())
 
             val filtered = client.get("/sessions/s1/events?type=WorkspaceStateObserved&limit=1")
             val filteredArray = testJson.parseToJsonElement(filtered.bodyAsText()) as JsonArray
@@ -277,6 +280,9 @@ class EventInspectRoutesTest {
                 "WorkspaceStateObserved",
                 (filteredArray[0] as JsonObject)["type"]!!.jsonPrimitive.content,
             )
+            // Truncation is applied AFTER filtering: the tail of the two WorkspaceStateObserved
+            // events is seq 2, not the InitialIntent at seq 3.
+            assertEquals(2L, (filteredArray[0] as JsonObject)["sequence"]!!.jsonPrimitive.content.toLong())
         }
     }