docs: map existing codebase with PAUL

- stack.md - PrestaShop 1.7.x, PHP, Smarty, SCSS, modules
- architecture.md - MVC + hooks, override mechanism, CQRS in src/
- structure.md - Directory layout, key file locations
- conventions.md - PHP/Smarty/SCSS/JS conventions, PS patterns
- testing.md - No automated tests in custom modules
- integrations.md - Allegro, Empik, BaseLinker, shipping, payments
- concerns.md - Override fragility, EOL risk, missing CI/CD
- db_schema.md - Custom tables, modified core tables

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

.paul/codebase/integrations.md

@@ -0,0 +1,115 @@
+# External Integrations
+
+**Analysis Date:** 2026-04-27
+
+## Marketplaces
+
+**Allegro:**
+- x13allegro (v7.4.0) - Primary Allegro integration, order sync, product listing
+  - Module: `modules/x13allegro/x13allegro.php`
+  - Sync script: `modules/x13allegro/sync.php`
+  - Suppresses customer emails for Allegro orders
+- marzaallegro (v1.0.0) - Allegro pricing/markup module
+  - Module: `modules/marzaallegro/`
+
+**Empik:**
+- empikmarketplace (v2.3.0 by Waynet) - EmpikPlace integration
+  - Module: `modules/empikmarketplace/empikmarketplace.php`
+  - PSR-4 autoload: `Empik\Marketplace\`
+  - Overrides admin product catalog views:
+    `modules/empikmarketplace/views/PrestaShop/Admin/Product/CatalogPage/Lists/list.html.twig`
+
+## Shipping / Logistics
+
+**DPD Polska:**
+- Module: `modules/dpdpoland/` (v4.5.0)
+
+**InPost:**
+- Module: `modules/sensbitinpost/` (v5.9.2) - InPost ShipX API
+
+**Poczta Polska:**
+- Module: `modules/sensbitpocztapolska/` (v5.6.2)
+
+**Paczka w Ruchu:**
+- Module: `modules/sensbitpaczkawruchu/`
+
+**FedEx:**
+- Module: `modules/sensbitfedex/`
+
+**Geis Logistic:**
+- Module: `modules/GeisLogistic/`
+
+## Payment Gateways
+
+**Przelewy24:**
+- Module: `modules/przelewy24/` (v1.3.96) - Polish online payments
+
+**iMoje (ING Bank):**
+- Module: `modules/imoje/` (v1.3.4) - Visa, MasterCard, BLIK
+
+**Native PrestaShop:**
+- Cash on delivery: `modules/ps_cashondelivery/`
+- Wire transfer: `modules/ps_wirepayment/`
+- Check payment: `modules/ps_checkpayment/`
+
+## Order Management
+
+**BaseLinker:**
+- Module: `modules/baselinker/` (v0.0.25) - Multi-channel order management
+  - Integration via webservice API
+
+**One-Page Checkout:**
+- Module: `modules/onepagecheckoutps/` (v1.0.1 by PresTeamShop)
+  - Overrides: `override/controllers/front/OrderController.php` (653 lines)
+
+## Analytics & Tracking
+
+**Google Tag Manager:**
+- Module: `modules/cdc_googletagmanager/`
+
+**Google Analytics 4:**
+- Module: `modules/pdgoogleanalytycs4pro/` (uses Guzzle HTTP client)
+
+**Google Merchant Center:**
+- Module: `modules/pdgooglemerchantcenterpro/`
+
+**eKomi Ratings:**
+- Module: `modules/ekomiratingsandreviews/`
+
+## SEO & URL
+
+**Advanced URLs:**
+- Module: `modules/fsadvancedurl/` - Custom URL rewriting
+  - Overrides: `override/classes/Dispatcher.php`, `override/classes/Link.php`
+
+**Sitemap:**
+- Module: `modules/gsitemap/`
+
+## Performance & Caching
+
+**LiteSpeed Cache:**
+- Module: `modules/litespeedcache/`
+  - Override: `override/classes/Media.php`
+
+**PS Optimizer + Lazy Images + WebP:**
+- `modules/psoptimizer/`, `modules/pshowlazyimg/`, `modules/x13webp/`
+
+## Cookie Consent
+
+**Cookies Plus:**
+- Module: `modules/cookiesplus/`
+  - Override: `override/classes/Hook.php` - intercepts hook execution for GDPR consent
+
+## Environment Configuration
+
+**Production:**
+- DB: `app/config/parameters.php` (credentials, memcached config)
+- Admin: `admin658c34/` (obfuscated path)
+- Deployment: FTP via `.vscode/ftp-kr.json`
+
+**No staging environment detected.**
+
+---
+
+*Integration audit: 2026-04-27*
+*Update when adding/removing external services*