Update buildpack-deps:bookworm Docker digest to a6934e0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
buildpack-deps	stage	digest	c35adcb → a6934e0

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Configuration

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[github-actions]

Renovate PR Review Results

⚖️ Safety Assessment: ✅ Safe

🔍 Release Content Analysis

This PR updates the buildpack-deps:bookworm Docker image digest from c35adcb to a6934e0. This change represents a routine security and package update to the Debian Bookworm base image.

Key Updates Included:

• Debian 12.13 Point Release (January 10, 2026): The update incorporates the latest Debian Bookworm point release with security patches and critical bug fixes
• Critical Security Fixes: Includes patches for OpenSSL (DSA-6113-1), Linux kernel (DSA-6126-1, DSA-6127-1), and other system packages
• System Package Updates: Updated versions of core packages including build tools (gcc, g++, make), development libraries, and ImageMagick
• No Breaking Changes: This is a digest-only update of the same bookworm tag, maintaining full backward compatibility

Security Improvements:

• OpenSSL security enhancements (January 27, 2026)
• Linux kernel security patches (February 9, 2026)
• ImageMagick DoS and integer overflow fixes
• Updated Intel microcode (20251111)

🎯 Impact Scope Investigation

Usage Analysis:
The buildpack-deps:bookworm image is used exclusively in api/Dockerfile:1 as a build stage (multi-stage build) named isolate. Its purpose is limited to:

1. Isolate Sandbox Compilation: Provides the build environment to compile the Isolate sandbox tool from source
2. Build Tools Required: Supplies git, libcap-dev, gcc, make, and other compilation dependencies
3. Discarded After Build: The buildpack-deps layer is not part of the final runtime image - only the compiled /usr/local/bin/isolate binary is copied to the final Node.js-based image

Dependencies Analysis:

• No runtime dependencies on buildpack-deps packages
• Final image uses node:20.19.6-bookworm-slim as the base
• Only build artifacts (isolate binary) are transferred between stages
• No API changes or configuration modifications required

Files Affected:

• api/Dockerfile (line 1): Single digest update, no functional changes

💡 Recommended Actions

Immediate Actions:

1. ✅ Safe to Merge: This PR can be merged immediately without any code modifications
2. ✅ No Migration Required: The digest update is transparent to the build process
3. ✅ Rebuild Recommended: Rebuild the API Docker image to incorporate security updates in the Isolate compilation environment

Post-Merge Steps:

1. Trigger the API image rebuild via the api-push.yaml workflow (automated on merge to master when api/** changes)
2. Verify the Isolate sandbox compiles successfully in CI/CD
3. No application code changes or configuration updates required

Risk Assessment:

• Backward Compatibility: ✅ Fully maintained
• Build Process Impact: ✅ No changes expected (same build tools, same versions)
• Runtime Impact: ✅ None (build-stage only)
• Security Posture: ✅ Improved (security patches applied)

🔗 Reference Links

• Debian 12.13 Release Notes
• Debian Security Information
• buildpack-deps Docker Hub
• buildpack-deps GitHub Repository
• Debian Bookworm Errata
• Snyk Vulnerability Report

Generated by koki-develop/claude-renovate-review