fix: Add DropboxSyncEnabled to initial_schema.sql and initial_migrations.sql

Doctrine ORM reads column annotations at migration time, so the column
must exist in the initial schema to avoid 'Unknown column' errors when
earlier migrations touch the Summit entity.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: caseylocker

database/migrations/model/initial_migrations.sql

@@ -342,4 +342,5 @@ INSERT INTO DoctrineMigration (version, executed_at) VALUES ('Database\\Migratio
 INSERT INTO DoctrineMigration (version, executed_at) VALUES ('Database\\Migrations\\Model\\Version20240320151845', '2024-04-11 16:52:02');
 INSERT INTO DoctrineMigration (version, executed_at) VALUES ('Database\\Migrations\\Model\\Version20240326133631', '2024-04-11 16:52:06');
 INSERT INTO DoctrineMigration (version, executed_at) VALUES ('Database\\Migrations\\Model\\Version20240326133636', '2024-04-11 16:52:06');
-INSERT INTO DoctrineMigration (version, executed_at) VALUES ('Database\\Migrations\\Model\\Version20240410135620', '2024-04-11 16:52:06');
+INSERT INTO DoctrineMigration (version, executed_at) VALUES ('Database\\Migrations\\Model\\Version20240410135620', '2024-04-11 16:52:06');
+INSERT INTO DoctrineMigration (version, executed_at) VALUES ('Database\\Migrations\\Model\\Version20260318120000', '2026-03-18 12:00:00');

database/migrations/model/initial_schema.sql

@@ -9129,6 +9129,7 @@ create table Summit
     SecondaryLogoID                                    int                                              null,
     SpeakersSupportEmail                               varchar(255)                                     null,
     MarkAsDeleted                                      tinyint unsigned                default '0'      not null,
+    DropboxSyncEnabled                                 tinyint(1)                      default 0        not null,
     constraint QRCodesEncKey
         unique (QRCodesEncKey),
     constraint Summit_RegistrationSlugPrefix