chore(ci)(deps): bump actions/upload-artifact from 4 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/brain-seal-refresh.yml

@@ -37,7 +37,7 @@ jobs:
           EOF
 
       - name: Upload brain seals
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: brain-seals
           path: .trinity/seals/brain_*.json

.github/workflows/build-paper.yml

@@ -53,7 +53,7 @@ jobs:
           pdflatex -interaction=nonstopmode main.tex
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: goldenfloat-paper
           path: docs/WHITEPAPER/

.github/workflows/conformance-integrity-gate.yml

@@ -56,7 +56,7 @@ jobs:
 
       - name: Upload integrity report
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: wp18-conformance-report
           path: wp18_report.json

.github/workflows/coq-proofs.yml

@@ -109,7 +109,7 @@ jobs:
 
       - name: Upload Status Report
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: coq-status-report
           path: proofs/trinity/coq-status.md

.github/workflows/fpga-build.yml

@@ -70,7 +70,7 @@ jobs:
 
       - name: Upload generated Verilog
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: fpga-verilog
           path: build/fpga/generated/
@@ -237,7 +237,7 @@ jobs:
 
       - name: Upload synthesis output
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: fpga-synthesis
           path: |
@@ -364,7 +364,7 @@ jobs:
           ls -la build/fpga/
       
       - name: Upload bitstream artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: fpga-bitstream-${{ github.sha }}
           path: build/fpga/bitstream.bit
@@ -398,7 +398,7 @@ jobs:
           sed -i 's/^          //' build/fpga/FLASHING.md
 
       - name: Upload bitstream + flashing guide
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: fpga-bitstream-${{ github.sha }}
           path: |
@@ -470,7 +470,7 @@ jobs:
 
       - name: Upload formal results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: fpga-formal
           path: build/fpga/formal/
@@ -595,7 +595,7 @@ jobs:
 
       - name: Upload conformance results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: fpga-conformance
           path: build/fpga/conformance/

.github/workflows/release.yml

@@ -45,31 +45,31 @@ jobs:
 
       - name: Upload wheels (Ubuntu x86_64)
         if: matrix.os == 'ubuntu-latest' && matrix.target == 'x86_64'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: python-wheels-x86_64
           path: target/wheels/*.whl
           retention-days: 7
 
       - name: Upload wheels (Ubuntu aarch64)
         if: matrix.os == 'ubuntu-latest' && matrix.target == 'aarch64'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: python-wheels-aarch64
           path: target/wheels/*.whl
           retention-days: 7
 
       - name: Upload wheels (macOS aarch64)
         if: matrix.os == 'macos-latest'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: python-wheels-macos
           path: target/wheels/*.whl
           retention-days: 7
 
       - name: Upload wheels (Windows x86_64)
         if: matrix.os == 'windows-latest'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: python-wheels-windows
           path: target/wheels/*.whl

.github/workflows/vivado-synth.yml

@@ -120,7 +120,7 @@ jobs:
           cat utilization_summary.txt
 
       - name: Upload bitstream
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         if: always()
         with:
           name: vivado-bitstream-${{ github.event.inputs.design || 'gf16' }}
@@ -131,7 +131,7 @@ jobs:
           if-no-files-found: warn
 
       - name: Upload Vivado logs & utilization
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         if: always()
         with:
           name: vivado-log-${{ github.event.inputs.design || 'gf16' }}