🔐 Auth: інтеграція JWT в Memory Service + конфігурації

- Опціональна JWT auth в Memory Service endpoints
- get_current_service_optional для backward compatibility
- NATS auth config (nkeys) - шаблони
- Qdrant auth config (API keys) - шаблони
- Тестовий скрипт для повного потоку

TODO: Генерація реальних JWT/ключів та застосування конфігів

services/memory-service/app/main.py

@@ -8,6 +8,7 @@ DAARION Memory Service - FastAPI Application
 """
 from contextlib import asynccontextmanager
 from typing import List, Optional
+from fastapi import Depends
 from uuid import UUID
 import structlog
 from fastapi import FastAPI, HTTPException, Query
@@ -23,6 +24,7 @@ from .models import (
 )
 from .vector_store import vector_store
 from .database import db
+from .auth import get_current_service, get_current_service_optional
 
 logger = structlog.get_logger()
 settings = get_settings()
@@ -76,8 +78,12 @@ async def health():
 # ============================================================================
 
 @app.post("/threads", response_model=ThreadResponse)
-async def create_thread(request: CreateThreadRequest):
+async def create_thread(
+    request: CreateThreadRequest,
+    service: Optional[dict] = Depends(get_current_service_optional)
+):
     """Create new conversation thread"""
+    # Auth опціональний: якщо JWT надано, перевіряємо; якщо ні - дозволяємо (dev режим)
     thread = await db.create_thread(
         org_id=request.org_id,
         user_id=request.user_id,
@@ -123,7 +129,10 @@ async def list_threads(
 # ============================================================================
 
 @app.post("/events", response_model=EventResponse)
-async def add_event(request: AddEventRequest):
+async def add_event(
+    request: AddEventRequest,
+    service: Optional[dict] = Depends(get_current_service_optional)
+):
     """Add event to conversation (message, tool call, etc.)"""
     event = await db.add_event(
         thread_id=request.thread_id,
@@ -158,7 +167,10 @@ async def get_events(
 # ============================================================================
 
 @app.post("/memories", response_model=MemoryResponse)
-async def create_memory(request: CreateMemoryRequest):
+async def create_memory(
+    request: CreateMemoryRequest,
+    service: Optional[dict] = Depends(get_current_service_optional)
+):
     """Create long-term memory item"""
     # Create in PostgreSQL
     memory = await db.create_memory(