initial: blog-app snapshot

.env.example

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+# blog-app environment variables (Stage 3)
+# Copy this file to .env or export the variables you want to override.
+# All variables are OPTIONAL — config.py has defaults for every entry below.
+# Format: VAR=default_value  # 用途 / 单位 / 范围
+
+# --- Flask ---
+FLASK_SECRET_KEY=dev-watchdog-secret-change-me  # Flask session/CSRF secret. 生产必须改为随机长字符串 (>=32 bytes entropy).
+
+# --- Database paths ---
+BLOG_APP_DB_PATH=~/opencode-blog-showcase/data/projects.db           # 主数据库 (projects/releases/issues). 绝对路径.
+BLOG_APP_WATCHDOG_DB=~/opencode-blog-showcase/data/watchdog.db       # 看门狗状态 DB. 绝对路径.
+
+# --- LLM backend ---
+BLOG_APP_LLM_URL=http://127.0.0.1:4000/v1      # OpenAI-compatible base URL. 走 litellm-proxy 本地网关.
+BLOG_APP_LLM_MODEL=default                     # 模型名, 透传给 LLM_URL.
+BLOG_APP_LLM_TIMEOUT=300                       # LLM 单次请求超时. 单位: 秒. 范围 30-600.
+
+# --- Rate limiter (in-memory, per-process) ---
+BLOG_APP_RATE_LIMIT_MAX=3      # /api/analyze/stream 每 IP 窗口内最大请求数. 单位: 次. 范围 1-100.
+BLOG_APP_RATE_LIMIT_WINDOW=60  # 限流窗口长度. 单位: 秒. 范围 10-3600.
+
+# --- Watchdog ---
+BLOG_APP_WATCHDOG_COOLDOWN=60  # /watchdog/run 手动触发后的冷却时间. 单位: 秒. 范围 0-3600.