feat: max-bot-test initial — full surface coverage

- Slim 4 PSR-15 webhook, PHP-DI 7, Symfony Console 8
- 13 update handlers, 30+ command scenarios, all 7 button types
- Composer pulls pkirillw/max-bot-api-php from GitHub vcs
- Multi-stage Dockerfile (php-fpm 8.4-alpine) + nginx
- docker-compose.yml targets server (npm_default external)
- docker-compose.override.yml for local dev (gitignored)
- .gitea/workflows/deploy.yml mirrors ghost-blog-bot pattern

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,31 @@
+FROM php:8.4-fpm-alpine AS base
+
+RUN apk add --no-cache \
+        libzip-dev \
+        zlib-dev \
+        unzip \
+        git \
+        curl \
+    && docker-php-ext-install zip pcntl \
+    && curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
+
+WORKDIR /var/www/html
+
+# --- builder: composer install without dev deps, no scripts ---
+FROM base AS builder
+COPY composer.json composer.lock ./
+RUN composer install --no-dev --no-scripts --no-plugins --prefer-dist --no-interaction
+
+# --- runtime: copy app code on top of vendor/ ---
+FROM base AS runtime
+COPY --from=builder /var/www/html/vendor /var/www/html/vendor
+COPY composer.json composer.lock ./
+COPY bin ./bin
+COPY config ./config
+COPY public ./public
+COPY src ./src
+COPY storage ./storage
+
+RUN chown -R www-data:www-data /var/www/html/storage
+
+CMD ["php-fpm"]