#119 Add synthetic Data generator for request_comments and volunteer_rating

[Nishu2000-hub]

Synthetic data generator for two tables: request_comments and volunteer_rating.

What's included

• database/mock-data-generation/generate_119.py — the generator script
• database/mock-data-generation/README.md — documentation
• database/mock_db/request_comments.csv — 100 rows
• database/mock_db/volunteer_rating.csv — 100 rows

How to run

python generate_119.py              # 100 rows (default)
python generate_119.py --rows 500   # custom count
python generate_119.py --rows 40000 # scale test

# Once users.csv and request.csv exist from other teams:
python generate_119.py \
  --users-csv database/mock_db/users.csv \
  --requests-csv database/mock_db/request.csv

[Nishu2000-hub]

After submission, discovered the official help_categories table schema
at: github.com/saayam-for-all/request/wiki/1.0-MVP-Help-Categories
So, Follow up can be :
-Update generate_119.py to use official cat_ids from help_categories table

• Extend to generate req_add_info synthetic data using the
  req_add_info_metadata field definitions