Activity types and platform lowercase for historical data

[epipav]

Changes proposed ✍️

• updates activity type and platform to lowercase for historical data

What

🤖 Generated by Copilot at fc75f58

This change modifies the database schema to use lower case values for the type and platform columns in the activities table. This improves the data quality and simplifies the queries and filters.
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🤖 Generated by Copilot at fc75f58

activities table
lower case for type and platform
a spring cleaning

Why

How

🤖 Generated by Copilot at fc75f58

• Lower the case of type and platform columns in activities table to ensure consistency and avoid case-sensitive issues (link)

Checklist ✅

• Label appropriately with Feature, Improvement, or Bug.
• Add screehshots to the PR description for relevant FE changes
• New backend functionality has been unit-tested.
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.