refactor(negentropy): audit fixes for interop tests

- Delete `strfryDrivesGeodeAsServer` — boots strfry but uses
  kmp-negentropy ↔ Geode, no actual strfry-vs-geode interop.
  Duplicates `Nip77NegentropyTest.negentropyComputesSymmetricDifference`.
- Strip speculative `negentropy { enabled = ... }` and `nofiles`
  blocks from the strfry config; defaults are what we want to test.
- `InteropSyncDriver.reconcile` → `negotiate`. The function
  computes the symmetric difference; it doesn't move events.
  Convert to `suspend fun` to drop a nested `runBlocking` that
  could deadlock under dispatcher pressure.
- Inline `pullSync` helper in GeodeVsGeodeNegentropySyncTest —
  it was a one-line wrapper with a misleading name.
- Batch `relayB.preload(needFromA)` instead of looping.
- Tighten `idsOnRelay(NormalizedRelayUrl)` signature (was
  re-parsing the string on every call).
- Drop redundant `assertTrue(size > cap)` after `assertEquals(11)`.

quartz/src/commonTest/kotlin/com/vitorpamplona/quartz/nip01Core/store/sqlite/SnapshotIdsForNegentropyTest.kt

@@ -25,7 +25,6 @@ import com.vitorpamplona.quartz.nip01Core.signers.NostrSignerSync
 import com.vitorpamplona.quartz.nip10Notes.TextNoteEvent
 import kotlin.test.Test
 import kotlin.test.assertEquals
-import kotlin.test.assertTrue
 
 /**
  * Verifies the NIP-77 negentropy id-and-time projection against the
@@ -92,9 +91,11 @@ class SnapshotIdsForNegentropyTest : BaseDBTest() {
             // cap = 10; we have 30 rows, so the result must be 11
             // (cap + 1 sentinel) — matches strfry's `maxSyncEvents`
             // overflow-detection idiom.
+            // cap=10 with 30 rows → result must be the +1 sentinel
+            // (11 rows). Caller compares `size > cap` to detect
+            // overflow — matches strfry's `maxSyncEvents` idiom.
             val capped = db.snapshotIdsForNegentropy(listOf(filter), maxEntries = 10)
             assertEquals(11, capped.size)
-            assertTrue(capped.size > 10, "caller relies on size > cap as overflow signal")
 
             // cap >= total: returns the whole set unchanged.
             val whole = db.snapshotIdsForNegentropy(listOf(filter), maxEntries = 100)