fix: resolve Foundry installation and deployment verification issues

- Add foundryup command to actually install Foundry after download
- Add PATH export to Foundry test step to ensure forge is available
- This fixes the 'forge: command not found' error in CI

.gitea/workflows/smart-contract-tests.yml

@@ -118,12 +118,14 @@ jobs:
           if ! command -v forge &> /dev/null; then
             curl -L https://foundry.paradigm.xyz | bash
             export PATH="$HOME/.foundry/bin:$PATH"
-            source ~/.bashrc
+            foundryup
+            export PATH="$HOME/.foundry/bin:$PATH"
           fi
           forge --version
 
       - name: Test contracts with Foundry
         run: |
+          export PATH="$HOME/.foundry/bin:$PATH"
           cd /var/lib/aitbc-workspaces/foundry/repo/contracts
           
           # Ensure standard directories exist