feat: initial MVP - FastAPI backend + Vue3 frontend + docker-compose

- backend: FastAPI + SQLAlchemy 2.0(async) + asyncpg + Alembic
- 7 API routes: auth/me/articles/sources/bookmarks/subscriptions/admin
- models: User/Source/Article/Bookmark/Subscription/ApiToken
- services: RSS fetcher (feedparser) + Tencent TMT translator with quota + cache + local NLLB fallback
- workers: APScheduler + asyncio pipeline (fetch -> dedupe -> insert -> translate)
- seed scripts: create_user, seed_sources (5 RSS: Reuters/BBC/Al Jazeera/NHK/DW)
- frontend: Vue 3 + Vite + Naive UI + Pinia + vue-router
- pages: Login, Feed (24h), ArticleDetail, Sources, Bookmarks, AdminSources
- deploy: docker-compose (postgres/redis/api/worker/frontend/caddy)
- docs: README, DEPLOY, architecture, acceptance

backend/app/schemas/misc.py

@@ -0,0 +1,43 @@
+"""Bookmark / Subscription schemas."""
+from __future__ import annotations
+
+from datetime import datetime
+
+from pydantic import BaseModel, ConfigDict, Field
+
+from app.models.subscription import SubscriptionMatch
+
+
+class BookmarkIn(BaseModel):
+    article_id: int
+    note: str | None = None
+
+
+class BookmarkOut(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    id: int
+    user_id: int
+    article_id: int
+    note: str | None = None
+    created_at: datetime
+
+
+class SubscriptionIn(BaseModel):
+    keyword: str = Field(min_length=1, max_length=255)
+    match_in: SubscriptionMatch = SubscriptionMatch.ANY
+    channel: str = "telegram"
+    target: str | None = None
+
+
+class SubscriptionOut(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    id: int
+    keyword: str
+    match_in: SubscriptionMatch
+    channel: str
+    target: str | None = None
+    enabled: bool
+    last_hit_at: datetime | None = None
+    created_at: datetime