Removes the Statement cache since statements are not thread safe

quartz/src/androidMain/kotlin/com/vitorpamplona/quartz/nip01Core/store/sqlite/ExpirationModule.kt

@@ -70,7 +70,7 @@ class ExpirationModule : IModule {
     ) {
         val exp = event.expiration()
         if (exp != null && exp > 0) {
-            val stmt = StatementCache.get(insertExpiration, db)
+            val stmt = db.compileStatement(insertExpiration)
             stmt.bindLong(1, headerId)
             stmt.bindLong(2, exp)
             stmt.executeInsert()
@@ -87,7 +87,7 @@ class ExpirationModule : IModule {
         """.trimIndent()
 
     fun deleteExpiredEvents(db: SQLiteDatabase) {
-        StatementCache.get(deleteExpiredEvents, db).execute()
+        db.compileStatement(deleteExpiredEvents).execute()
     }
 
     override fun deleteAll(db: SQLiteDatabase) {

quartz/src/androidMain/kotlin/com/vitorpamplona/quartz/nip01Core/store/sqlite/FullTextSearchModule.kt

@@ -69,7 +69,7 @@ class FullTextSearchModule : IModule {
         db: SQLiteDatabase,
     ) {
         if (event is SearchableEvent) {
-            val stmt = StatementCache.get(insertFTS, db)
+            val stmt = db.compileStatement(insertFTS)
             stmt.bindLong(1, headerId)
             stmt.bindString(2, event.indexableContent())
             stmt.executeInsert()

quartz/src/androidMain/kotlin/com/vitorpamplona/quartz/nip01Core/store/sqlite/RightToVanishModule.kt

@@ -103,7 +103,7 @@ class RightToVanishModule : IModule {
         db: SQLiteDatabase,
     ) {
         if (event is RequestToVanishEvent && event.shouldVanishFrom(relayUrl)) {
-            val stmt = StatementCache.get(insertRTV, db)
+            val stmt = db.compileStatement(insertRTV)
             stmt.bindLong(1, headerId)
             stmt.bindString(2, event.pubKey)
             stmt.bindLong(3, event.createdAt)

quartz/src/androidMain/kotlin/com/vitorpamplona/quartz/nip01Core/store/sqlite/StatementCache.kt

@@ -1,50 +0,0 @@
-/**
- * Copyright (c) 2025 Vitor Pamplona
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to use,
- * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
- * Software, and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
- * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-package com.vitorpamplona.quartz.nip01Core.store.sqlite
-
-import android.database.sqlite.SQLiteDatabase
-import android.database.sqlite.SQLiteStatement
-import android.util.LruCache
-
-object StatementCache {
-    data class StatementKey(
-        val sql: String,
-        val dbHashcode: Int,
-    )
-
-    val cachedStatements = LruCache<StatementKey, SQLiteStatement>(10)
-
-    fun get(
-        sql: String,
-        db: SQLiteDatabase,
-    ): SQLiteStatement {
-        val key = StatementKey(sql, db.hashCode())
-        val cached = cachedStatements.get(key)
-        return if (cached != null) {
-            cached.clearBindings()
-            cached
-        } else {
-            val stat = db.compileStatement(sql)
-            cachedStatements.put(key, stat)
-            stat
-        }
-    }
-}