feat: add NORTH_STAR.md and MVP core loop (Telegram bot + LLM + proposal generator)

.env.example

@@ -0,0 +1,23 @@
+# Copy this file to .env and fill in your values.
+# Never commit .env to version control.
+
+# Telegram bot token from @BotFather
+TELEGRAM_BOT_TOKEN=
+
+# Comma-separated Telegram user IDs allowed to talk to Steward.
+# Leave empty to allow everyone (not recommended for production).
+TELEGRAM_ALLOWED_USER_IDS=
+
+# OpenAI (or compatible) credentials
+OPENAI_API_KEY=
+OPENAI_BASE_URL=https://api.openai.com/v1
+OPENAI_MODEL=gpt-4o
+
+# Optional: override the default system prompt
+# OPENAI_SYSTEM_PROMPT=
+
+# Daily analysis target (optional)
+# ANALYSIS_TARGET_URL=https://your-internal-api/endpoint
+# ANALYSIS_TARGET_API_KEY=
+# ANALYSIS_CRON_HOUR=8
+# ANALYSIS_CRON_MINUTE=0