feat(postgres): add internal database upgrade script

Publish upgrade-postgres.sh with install and upgrade flows, include the
PostgreSQL compose override when present, and sync the script to BunnyCDN.

tests/Feature/SyncBunnyTest.php

@@ -46,3 +46,22 @@ it('syncs nightly versions to BunnyCDN without creating a GitHub PR', function (
     Http::assertSent(fn ($request) => str_starts_with($request->url(), 'https://api.bunny.net/purge')
         && $request['url'] === 'https://cdn.coollabs.io/coolify-nightly/versions.json');
 });
+
+it('syncs postgres upgrade script to BunnyCDN during full sync', function () {
+    Http::fake([
+        'https://cdn.coollabs.io/coolify/*' => Http::response('', 404),
+        'https://storage.bunnycdn.com/*' => Http::response([], 201),
+        'https://api.bunny.net/purge*' => Http::response([], 200),
+    ]);
+
+    $this->artisan('sync:bunny')
+        ->expectsConfirmation('Are you sure you want to sync?', 'yes')
+        ->expectsOutputToContain('BunnyCDN sync: Complete')
+        ->assertExitCode(0);
+
+    Http::assertSent(fn ($request) => $request->method() === 'PUT'
+        && $request->url() === 'https://storage.bunnycdn.com/coolcdn/coolify/upgrade-postgres.sh');
+
+    Http::assertSent(fn ($request) => str_starts_with($request->url(), 'https://api.bunny.net/purge')
+        && $request['url'] === 'https://cdn.coollabs.io/coolify/upgrade-postgres.sh');
+});

tests/Unit/UpgradePostgresScriptTest.php

@@ -0,0 +1,93 @@
+<?php
+
+function assertBashSyntaxIsValid(string $path): void
+{
+    $process = proc_open(
+        ['bash', '-n', getcwd().'/'.$path],
+        [
+            1 => ['pipe', 'w'],
+            2 => ['pipe', 'w'],
+        ],
+        $pipes,
+        getcwd()
+    );
+
+    expect($process)->toBeResource();
+
+    $stdout = stream_get_contents($pipes[1]);
+    $stderr = stream_get_contents($pipes[2]);
+    fclose($pipes[1]);
+    fclose($pipes[2]);
+
+    $exitCode = proc_close($process);
+
+    expect($exitCode, trim($stdout."\n".$stderr))->toBe(0);
+}
+
+it('ships postgres upgrade scripts with valid bash syntax', function () {
+    assertBashSyntaxIsValid('scripts/upgrade-postgres.sh');
+    assertBashSyntaxIsValid('other/nightly/upgrade-postgres.sh');
+});
+
+it('downloads postgres upgrade script during install and upgrade without auto-running it', function (string $path) {
+    $script = file_get_contents(getcwd().'/'.$path);
+
+    expect($script)
+        ->toContain('upgrade-postgres.sh')
+        ->toContain('curl -fsSL -L $CDN/upgrade-postgres.sh -o /data/coolify/source/upgrade-postgres.sh')
+        ->toContain('chmod +x')
+        ->not->toContain('bash /data/coolify/source/upgrade-postgres.sh');
+})->with([
+    'stable install' => 'scripts/install.sh',
+    'nightly install' => 'other/nightly/install.sh',
+    'stable upgrade' => 'scripts/upgrade.sh',
+    'nightly upgrade' => 'other/nightly/upgrade.sh',
+]);
+
+it('keeps postgres upgrade compose override in future upgrade compose commands', function (string $path) {
+    $script = file_get_contents(getcwd().'/'.$path);
+
+    expect($script)
+        ->toContain('docker-compose.postgres-upgrade.yml')
+        ->toContain('Including PostgreSQL upgrade compose override in image extraction')
+        ->toContain('Using PostgreSQL upgrade compose override');
+})->with([
+    'stable upgrade' => 'scripts/upgrade.sh',
+    'nightly upgrade' => 'other/nightly/upgrade.sh',
+]);
+
+it('uses postgres 18 compatible mount path in generated override and restore container', function () {
+    $script = file_get_contents(getcwd().'/scripts/upgrade-postgres.sh');
+
+    expect($script)
+        ->toContain("printf '%s' '/var/lib/postgresql'")
+        ->toContain("printf '%s' '/var/lib/postgresql/data'")
+        ->toContain('- coolify-db:${mount_path}')
+        ->toContain('-v "${TARGET_VOLUME}:${TARGET_MOUNT_PATH}"');
+});
+
+it('persists rollback metadata and exposes a rollback command', function () {
+    $script = file_get_contents(getcwd().'/scripts/upgrade-postgres.sh');
+
+    expect($script)
+        ->toContain('ROLLBACK_FILE="${SOURCE_DIR}/postgres-upgrade-rollback.env"')
+        ->toContain('$0 rollback')
+        ->toContain('write_rollback_file')
+        ->toContain('PREVIOUS_VOLUME=')
+        ->toContain('PREVIOUS_IMAGE=')
+        ->toContain('PREVIOUS_MOUNT_PATH=')
+        ->toContain('rollback_postgres()')
+        ->toContain('Rollback completed successfully.');
+});
+
+it('detects the active postgres volume instead of assuming coolify-db', function () {
+    $script = file_get_contents(getcwd().'/scripts/upgrade-postgres.sh');
+
+    expect($script)
+        ->toContain('current_postgres_mount_name()')
+        ->toContain('current_postgres_mount_path()')
+        ->toContain('current_postgres_image()')
+        ->toContain('Current active volume: ${PREVIOUS_VOLUME}')
+        ->toContain("Previous volume '")
+        ->toContain('will be kept for rollback');
+});