chore: update runtime image to Debian 13

[RadCod3]

This pull request updates the base image used in the runtime stage of the Dockerfile to a newer Debian version. This change ensures the application uses the latest security patches and system libraries.

• Docker base image update:
  • Changed the runtime stage base image from gcr.io/distroless/cc-debian12:nonroot to gcr.io/distroless/cc-debian13:nonroot in Dockerfile.

[coderabbitai]

📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Updated the container runtime base image to use a newer version of Debian.

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Walkthrough

A single-line Docker configuration update upgrades the runtime base image from Debian 12 to Debian 13 (both distroless variants). The multistage build structure and all other components remain unchanged.

Changes

Cohort / File(s)	Summary
Base Image Update Dockerfile	Updated runtime stage base image from gcr.io/distroless/cc-debian12:nonroot to gcr.io/distroless/cc-debian13:nonroot

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A fresher Debian blooms today,
From twelve to thirteen, hip hooray!
The distroless image springs anew,
Our Docker build hops right on through! 🐇✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: updating the runtime base image to Debian 13.
Description check	✅ Passed	The description is directly related to the changeset, clearly explaining the base image update and its rationale.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.81%. Comparing base (18b5d5d) to head (5ef85e1).
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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #61   +/-   ##
=======================================
  Coverage   99.81%   99.81%           
=======================================
  Files          15       15           
  Lines        2661     2661           
=======================================
  Hits         2656     2656           
  Misses          5        5           

Flag	Coverage Δ
integration	99.81% <ø> (ø)

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