feat: ship verified platform upgrades with channel bundle releases

Package production dependencies per architecture for online and offline upgrades.
Validate dependencies and isolated backend startup before readiness, repair once
when permitted, and preserve service/data through failed preparation or rollback.

Publish release bundles with master images and expose an opt-in develop build
sharing the development index across Alpine and Debian images.

cli/test/internal/platformBundle.test.cjs

@@ -0,0 +1,35 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const os = require('node:os');
+const path = require('node:path');
+const { spawnSync } = require('node:child_process');
+
+test('the standalone operational CLI verifier carries its archive parser without panel dependencies', (t) => {
+  const directory = fs.mkdtempSync(path.join(os.tmpdir(), 'ql-cli-bundle-'));
+  t.after(() => fs.rmSync(directory, { recursive: true, force: true }));
+  const filename = path.join(directory, 'platformBundle.cjs');
+  fs.copyFileSync(
+    path.resolve(
+      __dirname,
+      '../../dist/internal/maintenance/platformBundle.cjs',
+    ),
+    filename,
+  );
+  const code = `
+    const Module=require('node:module'),load=Module._load;
+    Module._load=function(name,...args){
+      if(name!==process.argv[1]&&!name.startsWith('node:')&&!Module.builtinModules.includes(name))throw new Error('External dependency: '+name);
+      return load.call(this,name,...args);
+    };
+    const bundle=require(process.argv[1]);
+    if(typeof bundle.stageBundle!=='function')throw new Error('Missing verifier');
+    bundle.runtimeTarget().then(target=>console.log(bundle.targetKey(target))).catch(e=>{console.error(e);process.exitCode=1});
+  `;
+  const result = spawnSync(process.execPath, ['-e', code, filename], {
+    encoding: 'utf8',
+    env: { ...process.env, NODE_PATH: '' },
+  });
+  assert.equal(result.status, 0, result.stderr);
+  assert.match(result.stdout, new RegExp(`^${process.platform}-`));
+});