build(deps): bump rust from 1.90-slim-bullseye to 1.91-slim-bullseye in /app-server

[dependabot]

Bumps rust from 1.90-slim-bullseye to 1.91-slim-bullseye.

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Important

Bumps Rust version from 1.90-slim-bullseye to 1.91-slim-bullseye in app-server/Dockerfile.

• Dockerfile Update:
  • Bumps Rust version from 1.90-slim-bullseye to 1.91-slim-bullseye in app-server/Dockerfile.
  • Ensures compatibility with the latest Rust features and security updates.

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1. app-server/Dockerfile:2

• Draft comment:
  Bumping from 1.90 to 1.91 looks fine, but verify cargo-chef and related tools are compatible with 1.91. Consider pinning to a digest for more reproducible builds.
• Reason this comment was not posted:
  Confidence changes required: 33% <= threshold 50% None

Workflow ID: wflow_5CQLYaeFzrpN2K67

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