feat(notion): Finalize relational DB implementation and scripts

- Implement relational data structure in Notion as per the plan.
- Add scripts for initial data import (import_product.py) and distribution to related databases (distribute_product_data.py).
- Create helper scripts for reading Notion content.
- Update Notion_Dashboard.md and GEMINI.md with the latest implementation status, database IDs, and key lessons learned from the MVP phase, including API constraints and schema-first principles.

read_file_content.py

@@ -0,0 +1,19 @@
+
+import argparse
+
+def read_file_content(file_path):
+    """Reads and prints the content of a specified file."""
+    try:
+        with open(file_path, 'r', encoding='utf-8') as f:
+            print(f.read())
+    except FileNotFoundError:
+        print(f"Error: File not found at '{file_path}'")
+    except Exception as e:
+        print(f"An error occurred: {e}")
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Read and display the content of a file.")
+    parser.add_argument("file_path", help="The path to the file you want to read.")
+    args = parser.parse_args()
+    
+    read_file_content(args.file_path)