fix(code): increase diff scan limit

[adboio]

Problem

for large files, diffs sometimes render poorly (showing entire file changes) because the default codemirror diff scan limit is low

Changes

increases codemirror's default diff scan limit to avoid wonky diff rendering

How did you test this?

manually

[adboio]

• feat(code): disable editing in diff viewer #1395 : 2 dependent PRs (#1397 , #1409 )
• feat(code): unified PR creation workflow #1377
• send full diff to PR title/body generator #1394
• fix(code): dedupe suggested branch names #1393
• fix(code): increase diff scan limit #1392 👈 (View in Graphite)
• main

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[adboio]

Merge activity

• Mar 31, 8:47 PM UTC: A user started a stack merge that includes this pull request via Graphite.
• Mar 31, 8:47 PM UTC: @adboio merged this pull request with Graphite.