fix(db): drop sqlite3_flutter_libs to stop SQLCipher symbol-clash segfault

drift_flutter pulled sqlite3_flutter_libs, whose bundled plain SQLite exports
the same sqlite3_* symbols as sqlcipher_flutter_libs. With both loaded the app
segfaulted at startup on Linux desktop when opening the encrypted DB (the app
built and the Dart VM started, then crashed natively — "Lost connection").

drift_flutter was unused (we open the DB via our own encrypted executor), so
removing it drops sqlite3_flutter_libs and leaves SQLCipher as the only native
sqlite provider. 37 tests green; Linux build runs without crashing.

apps/app_seeds/linux/flutter/generated_plugin_registrant.cc

@@ -9,7 +9,6 @@
 #include <file_selector_linux/file_selector_plugin.h>
 #include <flutter_secure_storage_linux/flutter_secure_storage_linux_plugin.h>
 #include <sqlcipher_flutter_libs/sqlite3_flutter_libs_plugin.h>
-#include <sqlite3_flutter_libs/sqlite3_flutter_libs_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) file_selector_linux_registrar =
@@ -21,7 +20,4 @@ void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) sqlcipher_flutter_libs_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "Sqlite3FlutterLibsPlugin");
   sqlite3_flutter_libs_plugin_register_with_registrar(sqlcipher_flutter_libs_registrar);
-  g_autoptr(FlPluginRegistrar) sqlite3_flutter_libs_registrar =
-      fl_plugin_registry_get_registrar_for_plugin(registry, "Sqlite3FlutterLibsPlugin");
-  sqlite3_flutter_libs_plugin_register_with_registrar(sqlite3_flutter_libs_registrar);
 }

apps/app_seeds/linux/flutter/generated_plugins.cmake

@@ -6,7 +6,6 @@ list(APPEND FLUTTER_PLUGIN_LIST
   file_selector_linux
   flutter_secure_storage_linux
   sqlcipher_flutter_libs
-  sqlite3_flutter_libs
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST

apps/app_seeds/pubspec.yaml

@@ -24,9 +24,10 @@ dependencies:
   # Stream combinators (StreamGroup) for reactive multi-table reads.
   async: ^2.11.0
 
-  # Encrypted local database.
+  # Encrypted local database. NOTE: do NOT add sqlite3_flutter_libs / drift_flutter
+  # — their bundled plain SQLite collides (same symbols) with SQLCipher and
+  # segfaults on desktop. SQLCipher is the only native sqlite provider here.
   drift: ^2.28.0
-  drift_flutter: ^0.2.4
   sqlite3: ^2.7.5
   sqlcipher_flutter_libs: ^0.6.5
 

pubspec.lock

@@ -225,14 +225,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.31.0"
-  drift_flutter:
-    dependency: transitive
-    description:
-      name: drift_flutter
-      sha256: c07120854742a0cae2f7501a0da02493addde550db6641d284983c08762e60a7
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.2.8"
   equatable:
     dependency: transitive
     description:
@@ -953,14 +945,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.9.4"
-  sqlite3_flutter_libs:
-    dependency: transitive
-    description:
-      name: sqlite3_flutter_libs
-      sha256: eeb9e3a45207649076b808f8a5a74d68770d0b7f26ccef6d5f43106eee5375ad
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.5.42"
   sqlparser:
     dependency: transitive
     description: