chore: update workflow actions and Docker build secrets (#6539)

* chore: update workflow actions and docker build secrets

* fix: preserve existing mise config

* chore: update build-push action to version 1.5.1 across workflows

* chore: use @major action versions and guard Dockerfile secret exports

- Switch all GitHub Actions from pinned versions (@v4.2.1) to major
  tags (@v4) per GitHub convention.
- Guard /run/secrets/ exports in Dockerfiles with '[ -s ... ]' checks
  so missing optional secrets don't export empty env vars.

Amp-Thread-ID: https://ampcode.com/threads/T-019d4b84-83d7-7455-b971-e5639998ef4f
Co-authored-by: Amp <[email protected]>

---------

Co-authored-by: akshat5302 <[email protected]>
Co-authored-by: Amp <[email protected]>

.github/workflows/codeql.yml

@@ -27,11 +27,11 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v3
+        uses: github/codeql-action/init@v4
         with:
           languages: ${{ matrix.language }}
           # If you wish to specify custom queries, you can do so here or in a config file.
@@ -44,7 +44,7 @@ jobs:
       # Autobuild attempts to build any compiled languages (C/C++, C#, Go, Java, or Swift).
       # If this step fails, then you should remove it and run the build manually (see below)
       - name: Autobuild
-        uses: github/codeql-action/autobuild@v3
+        uses: github/codeql-action/autobuild@v4
 
       # ℹ️ Command-line programs to run using the OS shell.
       # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
@@ -57,6 +57,6 @@ jobs:
       #     ./location_of_script_within_repo/buildscript.sh
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v3
+        uses: github/codeql-action/analyze@v4
         with:
           category: "/language:${{matrix.language}}"