Set POSTGRES_MAX_POOL in integration test

This attempts to avoid connection errors that arise when the DB doesn't
have more available connections than what is being requested by the pool.
This will be set to 1 in the workflow variables.

Author: lossyrob

.github/workflows/python-integration-tests.yml

@@ -137,6 +137,7 @@ jobs:
           OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
           PINECONE_API_KEY: ${{ secrets.PINECONE__APIKEY }}
           POSTGRES_CONNECTION_STRING: ${{secrets.POSTGRES__CONNECTIONSTR}}
+          POSTGRES_MAX_POOL: ${{ vars.POSTGRES_MAX_POOL }}
           AZURE_AI_SEARCH_API_KEY: ${{secrets.AZURE_AI_SEARCH_API_KEY}}
           AZURE_AI_SEARCH_ENDPOINT: ${{secrets.AZURE_AI_SEARCH_ENDPOINT}}
           MONGODB_ATLAS_CONNECTION_STRING: ${{secrets.MONGODB_ATLAS_CONNECTION_STRING}}
@@ -264,6 +265,7 @@ jobs:
           OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
           PINECONE_API_KEY: ${{ secrets.PINECONE__APIKEY }}
           POSTGRES_CONNECTION_STRING: ${{secrets.POSTGRES__CONNECTIONSTR}}
+          POSTGRES_MAX_POOL: ${{ vars.POSTGRES_MAX_POOL }}
           AZURE_AI_SEARCH_API_KEY: ${{secrets.AZURE_AI_SEARCH_API_KEY}}
           AZURE_AI_SEARCH_ENDPOINT: ${{secrets.AZURE_AI_SEARCH_ENDPOINT}}
           MONGODB_ATLAS_CONNECTION_STRING: ${{secrets.MONGODB_ATLAS_CONNECTION_STRING}}