[MVP] Migration from Athena to OpenSearch

[ehfounder]

As a user, I would like to have faster and more accurate search results on GEO.ca, so that I can find the information and data that I need in a timely manner.

After investigating available technologies, we have decided to use Amazon OpenSearch as a replacement of our backend search.

Requirements:

• Create a cost-effective AWS OpenSearch Domain
• Create a lambda function to push geocore data into OpenSearch
• Create search indexes and verify keyword search is working properly
• Create a lambda function to convert OpenSearch output to match existing keyword search API results
• Ensure frontend integration works properly and is improved
• Monitoring and scale

[xinli-cai]

Update:

• OpenSearch Domain is deployed using CloudFormation on DEV environment.
• Semantic Search and Vector Index is deployed on the OpenSearch domain on Dev