Add fetch_evening_tasks.py script and shared notion_helpers module

Refactors weekly-template's Notion client setup into a shared helper
(with .env/dotenv support and full pagination), and adds a dedicated
evening-prep script so both commands can fall back to script-based
fetching instead of the MCP search/fetch pattern.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

scripts/notion_helpers.py

@@ -0,0 +1,46 @@
+"""Shared Notion client setup and query helpers for the FullFocus scripts."""
+
+import json
+import os
+import sys
+from pathlib import Path
+
+from dotenv import load_dotenv
+from notion_client import Client
+
+load_dotenv(Path(__file__).resolve().parent.parent / ".env")
+
+_notion_token = os.getenv('NOTION_TOKEN')
+if not _notion_token:
+    print(json.dumps({"error": "NOTION_TOKEN environment variable not set. See scripts/README.md for setup instructions."}), file=sys.stderr)
+    sys.exit(1)
+
+notion = Client(auth=_notion_token)
+
+# Database IDs
+PROJECTS_DB = "2c0abd6c450a8090aca3e0b2b0373c17"
+TASKS_DB = "2c0abd6c450a805098d3cc0e7d3dfccf"
+READING_LIST_DB = "2c4abd6c450a80cbae55c440dd9e2427"
+
+_data_source_id_cache = {}
+
+def get_data_source_id(database_id):
+    """Resolve a database ID to its first data source ID (notion-client 3.x API)."""
+    if database_id not in _data_source_id_cache:
+        db = notion.databases.retrieve(database_id=database_id)
+        _data_source_id_cache[database_id] = db["data_sources"][0]["id"]
+    return _data_source_id_cache[database_id]
+
+def query_all(data_source_id, **kwargs):
+    """Query a data source, following pagination until all matching pages are collected."""
+    pages = []
+    start_cursor = None
+    while True:
+        if start_cursor:
+            kwargs["start_cursor"] = start_cursor
+        results = notion.data_sources.query(data_source_id=data_source_id, **kwargs)
+        pages.extend(results["results"])
+        if not results.get("has_more"):
+            break
+        start_cursor = results["next_cursor"]
+    return pages