Group root Dependabot PRs

[burtenshaw]

This PR keeps envs/** excluded from Dependabot and adds grouping for the remaining root-level ecosystems.

After this merges, Dependabot should consolidate root uv updates into one grouped PR and root GitHub Actions updates into one grouped PR, instead of opening one PR per dependency.

Validation:

• .github/dependabot.yml parses as YAML.

[greptile-apps]

Greptile Summary

This PR updates .github/dependabot.yml to add groups configuration for both the uv and github-actions ecosystems, consolidating per-dependency Dependabot PRs into one grouped PR per ecosystem per week. The envs/** exclusion on the uv block is unchanged from the prior commit.

Alignment Review Report

Automated Checks

• Lint: PASS — valid YAML, well-formed Dependabot v2 schema
• Debug code: CLEAN — configuration file only

Tier 1: Fixes Required

None identified.

Tier 2: Alignment Discussion

None identified — this change is purely operational/CI tooling with no impact on environment abstractions, reward signals, or agent APIs.

Confidence Score: 5/5

Safe to merge — minimal, well-scoped change to CI tooling with no code impact.

The change is a single configuration file edit with no Tier 1 issues. The YAML is valid, the Dependabot v2 schema is used correctly, grouping syntax matches GitHub's documented format, and the existing envs/** exclusion is preserved. No alignment concerns exist for a tooling-only change.

No files require special attention.

Important Files Changed

Filename	Overview
.github/dependabot.yml	Adds groups blocks to both uv and github-actions ecosystems so Dependabot consolidates per-ecosystem updates into a single grouped PR instead of one PR per dependency; envs/** exclusion is preserved on the uv block.

_{Reviews (1): Last reviewed commit: "chore: group root dependabot prs" | Re-trigger Greptile}