Switch workflows to Debian 13 (Trixie) containers

- Change from Ubuntu to Debian 13 containers for both workflows
- Update environment variables from UBUNTU_VERSION to DEBIAN_VERSION
- Add explanatory comments about using Debian for Debian-focused project
- Update build info files to reflect Debian version instead of Ubuntu
- Maintain all Rust toolchain and build logic improvements

.forgejo/workflows/build-artifacts.yml

@@ -23,15 +23,16 @@ on:
   workflow_dispatch:
 
 env:
-  UBUNTU_VERSION: "24.04"
-  RUST_VERSION: "1.75.0"
+  DEBIAN_VERSION: "13"
+  RUST_VERSION: "1.84.1"
 
 jobs:
   build-artifacts:
     name: Build deb-bootupd Artifacts
     runs-on: ubuntu-latest
-    container:
-      image: ubuntu:latest
+      container:
+      # Use Debian 13 (Trixie) since this is a Debian-focused project
+      image: debian:13
     steps:
       - name: Setup build environment
         shell: bash
@@ -165,7 +166,7 @@ jobs:
           deb-bootupd Build Information
           =============================
           Build Date: $(date)
-          Ubuntu Version: ${UBUNTU_VERSION}
+          Debian Version: ${DEBIAN_VERSION}
           Rust Version: $(rustc --version)
           Cargo Version: $(cargo --version)
           Git Commit: $(git rev-parse --short HEAD)
@@ -237,7 +238,7 @@ jobs:
           deb-bootupd Build Summary
           =========================
           Build Date: $(date)
-          Ubuntu Version: ${UBUNTU_VERSION}
+          Debian Version: ${DEBIAN_VERSION}
           Rust Version: $(rustc --version)
           Git Commit: $(git rev-parse --short HEAD)
           Git Branch: $(git branch --show-current)

.forgejo/workflows/simple-build.yml

@@ -13,8 +13,9 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    container:
-      image: ubuntu:latest
+      container:
+      # Use Debian 13 (Trixie) since this is a Debian-focused project
+      image: debian:13
     steps:
       - name: Checkout code and setup environment
         run: |