chore: run Dependabot daily

[kossoy]

Switch Dependabot schedule weekly→daily across this repo's ecosystems. Patch/minor auto-merge; major stays manual. Refs #761

Greptile Summary

This PR changes the Dependabot cadence for the repo.

• Go module updates now run daily.
• npm updates now run daily.
• GitHub Actions updates now run daily.

Confidence Score: 5/5

The change is limited to Dependabot scheduling configuration and is safe to merge.

Only .github/dependabot.yml is changed, and the update consistently switches configured ecosystems from weekly to daily cadence without affecting application runtime code.

T-Rex Logs

What T-Rex did

• Reviewed the pre-change validation log and confirmed it shows weekly intervals for gomod, npm, and github-actions with CONTRACT_MINOR_PATCH_EXCLUDES_MAJOR: True.
• Reviewed the post-change validation log and confirmed it shows daily intervals for gomod, npm, and github-actions with CONTRACT_MINOR_PATCH_EXCLUDES_MAJOR: True.
• Verified that both validation runs exited with status 0.

_{Ran code and verified through T-Rex}

_{Reviews (1): Last reviewed commit: "chore: run Dependabot daily instead of w..." | Re-trigger Greptile}