ci: medusa workflow using a custom base container

.github/workflows/tests.yml

@@ -17,11 +17,6 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install Foundry
-        uses: foundry-rs/foundry-toolchain@v1
-        with:
-          version: nightly
-
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
@@ -44,11 +39,6 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install Foundry
-        uses: foundry-rs/foundry-toolchain@v1
-        with:
-          version: nightly
-
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
@@ -63,18 +53,29 @@ jobs:
 
       - name: Run tests
         run: yarn test:integration
+  medusa-tests:
+    name: Medusa Test
+    runs-on: ubuntu-latest
+    container: 0xteddybear/eth-security-toolbox-ci
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install dependencies
+        run: yarn --frozen-lockfile --network-concurrency 1
+
+      - name: Run Medusa
+        run: medusa fuzz --timeout 100
 
   halmos-tests:
     name: Run symbolic execution tests
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install Foundry
-        uses: foundry-rs/foundry-toolchain@v1
-        with:
-          version: nightly
-
       - name: Use Node.js
         uses: actions/setup-node@v4
         with: