fix: change gsi1pk from uppercase to lowercase to match DynamoDB data

[tathagat2241]

Issue

Configuration, Organization, Site, and Project queries were failing with 404 errors in both dev and prod environments.

Root Cause

• All data in DynamoDB has lowercase gsi1pk values (e.g., "all_configurations", "all_sites")
• Query code was looking for uppercase values (e.g., "ALL_CONFIGURATIONS", "ALL_SITES")
• This case mismatch caused queries to return no results

Fix

Changed entityNameToAllPKValue() to generate lowercase values to match existing DynamoDB data.

Verification

Checked DynamoDB and confirmed ALL entities use lowercase:

• Configuration: "all_configurations" ✓
• Organization: "all_organizations" ✓
• Site: "all_sites" ✓
• Project: "all_projects" ✓

Impact

Fixes queries for all 9 entities using addAllIndex():
Configuration, Organization, Site, Project, Report, ImportJob, ScrapeJob, TrialUser, SiteCandidate

Testing

Will test in dev using gitpkg before final deployment.

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• make sure to link the related issues in this description
• when merging / squashing, make sure the fixed issue references are visible in the commits, for easy compilation of release notes

Related Issues

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This PR will trigger a patch release when merged.