Phase 2 sub-commit 5: convention test passes, skeleton walkthrough, phase 2 closed

Runs `make:bridge:resource Todo` against the skeleton, then `make:migration`
+ `doctrine:migrations:migrate`, and verifies the round-trip end-to-end:

  - POST /api/todos creates a row with a UUIDv7 id
  - GET /api/todos returns the row
  - Mercure dual-publishes:
    - app://model/todo (collection topic)
    - app://model/todo/{uuid} (entity topic)
  - The published envelope shape matches PLAN.md §4 exactly:
    {op:"upsert", id:..., version:..., data:{...}, correlationKey:"..."}
  - correlationKey echoes the request's Idempotency-Key, ready to be
    matched by ReactiveListModel's pending state on the QML side.

Generated files committed as the regression baseline (Phase 3 will add
a CI check that re-running the maker reproduces these byte-for-byte):

  - framework/skeleton/symfony/src/Entity/Todo.php
  - framework/skeleton/symfony/src/Controller/TodoController.php
  - framework/skeleton/symfony/migrations/Version20260502004612.php
  - framework/skeleton/qml/TodoList.qml

framework/skeleton/README.md captures the three-command flow plus a
curl walkthrough so future readers can reproduce. Phase 2 done.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

framework/skeleton/symfony/migrations/Version20260502004612.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20260502004612 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('CREATE TABLE todo (id BLOB NOT NULL, title VARCHAR(255) NOT NULL, done BOOLEAN NOT NULL, PRIMARY KEY (id))');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('DROP TABLE todo');
+    }
+}