feat: increases column size of PatientMetadata.key

[jrwils]

https://canvasmedical.atlassian.net/browse/KOALA-4389

This PR adds the corresponding change to the data module for PatientMetadata.key. Related home-app PR here:

https://github.com/canvas-medical/canvas/pull/18781

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.57%. Comparing base (64d0f46) to head (7937368).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1558   +/-   ##
=======================================
  Coverage   93.56%   93.57%           
=======================================
  Files         487      487           
  Lines       21850    21851    +1     
  Branches     1013     1013           
=======================================
+ Hits        20445    20446    +1     
  Misses       1252     1252           
  Partials      153      153           

Flag	Coverage Δ
plugin-abnormal_lab_task_notification	100.00% <ø> (ø)
plugin-api_samples	33.33% <ø> (ø)
plugin-appointment_coverage_label	100.00% <ø> (ø)
plugin-coverage_metadata_sync	100.00% <ø> (ø)
plugin-my_first_plugin	100.00% <ø> (ø)
plugin-patient_summary_chart_groups	100.00% <ø> (ø)
plugin-preact_hello_world	100.00% <ø> (ø)
plugin-send_all_prescriptions	100.00% <ø> (ø)
plugin-simple_note_button_plugin	100.00% <ø> (ø)
plugin-supervising_provider_prescribe	100.00% <ø> (ø)
plugin-supervising_provider_prescribe_protocol	100.00% <ø> (ø)
plugin-upsert_patient_metadata	100.00% <ø> (ø)
plugin-vitals_visualizer_plugin	98.43% <ø> (ø)
py3.11	93.59% <100.00%> (-0.01%)	⬇️
py3.12	93.59% <100.00%> (-0.01%)	⬇️
sdk-core	93.59% <100.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.