feat(notify-bridge): phase 6 - database models and server API

New database schema with ServiceProvider abstraction:
- ServiceProvider (replaces ImmichServer): type + JSON config
- Tracker (replaces AlbumTracker): owns tracking_config_id
- TrackingConfig: provider_type scoped, owned by Tracker
- TemplateConfig: provider_type scoped, owned by Target
- NotificationTarget: owns template_config_id (not tracking_config_id)
- TrackerState, EventLog, User, TelegramBot, TelegramChat

Full FastAPI server:
- /api/providers: CRUD + test connection + list collections
- /api/trackers: CRUD
- /api/tracking-configs: CRUD with provider_type filter
- /api/template-configs: CRUD with provider_type filter, system defaults
- /api/targets: CRUD
- /api/template-vars: variable docs filtered by provider type
- /api/auth: setup, login, refresh, me, password change
- /api/health: health check
- Default template seeding on first startup (EN/RU for Immich)
- pydantic-settings with NOTIFY_BRIDGE_ env prefix

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/server/src/notify_bridge_server/api/providers.py

@@ -0,0 +1,159 @@
+"""Service Provider CRUD API routes."""
+
+from fastapi import APIRouter, Depends, HTTPException
+from pydantic import BaseModel
+from sqlmodel import select
+from sqlmodel.ext.asyncio.session import AsyncSession
+from typing import Any
+
+from ..auth.dependencies import get_current_user
+from ..database.engine import get_session
+from ..database.models import ServiceProvider, User
+
+router = APIRouter(prefix="/api/providers", tags=["providers"])
+
+
+class ProviderCreate(BaseModel):
+    type: str
+    name: str
+    icon: str = ""
+    config: dict[str, Any] = {}
+
+
+class ProviderUpdate(BaseModel):
+    name: str | None = None
+    icon: str | None = None
+    config: dict[str, Any] | None = None
+
+
+@router.get("")
+async def list_providers(
+    user: User = Depends(get_current_user),
+    session: AsyncSession = Depends(get_session),
+):
+    result = await session.exec(
+        select(ServiceProvider).where(ServiceProvider.user_id == user.id)
+    )
+    return result.all()
+
+
+@router.post("", status_code=201)
+async def create_provider(
+    body: ProviderCreate,
+    user: User = Depends(get_current_user),
+    session: AsyncSession = Depends(get_session),
+):
+    provider = ServiceProvider(
+        user_id=user.id,
+        type=body.type,
+        name=body.name,
+        icon=body.icon,
+        config=body.config,
+    )
+    session.add(provider)
+    await session.commit()
+    await session.refresh(provider)
+    return provider
+
+
+@router.get("/{provider_id}")
+async def get_provider(
+    provider_id: int,
+    user: User = Depends(get_current_user),
+    session: AsyncSession = Depends(get_session),
+):
+    provider = await session.get(ServiceProvider, provider_id)
+    if not provider or provider.user_id != user.id:
+        raise HTTPException(status_code=404, detail="Provider not found")
+    return provider
+
+
+@router.put("/{provider_id}")
+async def update_provider(
+    provider_id: int,
+    body: ProviderUpdate,
+    user: User = Depends(get_current_user),
+    session: AsyncSession = Depends(get_session),
+):
+    provider = await session.get(ServiceProvider, provider_id)
+    if not provider or provider.user_id != user.id:
+        raise HTTPException(status_code=404, detail="Provider not found")
+
+    if body.name is not None:
+        provider.name = body.name
+    if body.icon is not None:
+        provider.icon = body.icon
+    if body.config is not None:
+        provider.config = body.config
+
+    session.add(provider)
+    await session.commit()
+    await session.refresh(provider)
+    return provider
+
+
+@router.delete("/{provider_id}", status_code=204)
+async def delete_provider(
+    provider_id: int,
+    user: User = Depends(get_current_user),
+    session: AsyncSession = Depends(get_session),
+):
+    provider = await session.get(ServiceProvider, provider_id)
+    if not provider or provider.user_id != user.id:
+        raise HTTPException(status_code=404, detail="Provider not found")
+    await session.delete(provider)
+    await session.commit()
+
+
+@router.post("/{provider_id}/test")
+async def test_provider(
+    provider_id: int,
+    user: User = Depends(get_current_user),
+    session: AsyncSession = Depends(get_session),
+):
+    provider = await session.get(ServiceProvider, provider_id)
+    if not provider or provider.user_id != user.id:
+        raise HTTPException(status_code=404, detail="Provider not found")
+
+    if provider.type == "immich":
+        import aiohttp
+        from notify_bridge_core.providers.immich import ImmichServiceProvider
+        config = provider.config
+        async with aiohttp.ClientSession() as http_session:
+            immich = ImmichServiceProvider(
+                http_session,
+                config.get("url", ""),
+                config.get("api_key", ""),
+                config.get("external_domain"),
+                provider.name,
+            )
+            return await immich.test_connection()
+
+    return {"ok": False, "message": f"Unknown provider type: {provider.type}"}
+
+
+@router.get("/{provider_id}/collections")
+async def list_collections(
+    provider_id: int,
+    user: User = Depends(get_current_user),
+    session: AsyncSession = Depends(get_session),
+):
+    provider = await session.get(ServiceProvider, provider_id)
+    if not provider or provider.user_id != user.id:
+        raise HTTPException(status_code=404, detail="Provider not found")
+
+    if provider.type == "immich":
+        import aiohttp
+        from notify_bridge_core.providers.immich import ImmichServiceProvider
+        config = provider.config
+        async with aiohttp.ClientSession() as http_session:
+            immich = ImmichServiceProvider(
+                http_session,
+                config.get("url", ""),
+                config.get("api_key", ""),
+                config.get("external_domain"),
+                provider.name,
+            )
+            return await immich.list_collections()
+
+    return []