Arhitectură (diagrame) + imagini Docker module + contract furnizare + optimizări deploy

- docs/ARCHITECTURE.md (7 diagrame Mermaid) + architecture.html + diagrame originale (offer_diagram_1..7.png)
- artefacte_lot1/imagini_docker: imagini pre-construite pt toate cele 13 module (la zi)
- documentatie: Contract de furnizare nr.19
- optimizări deploy.sh/seed (MODELS_DIR, fix download python3); .gitignore (modele/.env/PV-uri excluse)

.gitignore

@@ -1,9 +1,13 @@
-
-# Modele locale (mari, descarcate de deploy.sh) — NU se comit
+# === DiDi LOT 1 — .gitignore ===
 ai_platform/models/
-ai_platform/local_gpu_stack/.env
-ai_platform/local_gpu_stack/test_assets/
+**/.env
+**/node_modules/
 ai_platform/local_gpu_stack/runs/
-
-# Poze de test UI — NU se comit (purjate si din istoric)
+ai_platform/local_gpu_stack/test_assets/
+ai_platform/local_gpu_stack/reports/
 poze teste ui/
+poze_testare/
+/Raport_Testare_LOT1.docx
+/Proces_Verbal_Predare_Primire_LOT1.docx
+/Proces_Verbal_Acceptanta_LOT1.docx
+/*.tar.gz