fix(ci): add deep-fuzz-pr job for pull_request events with 500 iterations

Author: oluwaseyi1996-netizen

.github/workflows/contracts.yml

@@ -69,6 +69,29 @@ jobs:
         env:
           FUZZ_ITERATIONS: 256
 
+  deep-fuzz:
+    name: Deep Fuzz (2k cases each -- nightly)
+    if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
+    runs-on: ubuntu-latest
+    timeout-minutes: 120
+    defaults:
+      run:
+        working-directory: contracts
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: 1.91.0
+          targets: wasm32v1-none
+          components: rustfmt, clippy
+
+      - name: Cache Rust dependencies
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: contracts
+
   deep-fuzz:
     name: Deep Fuzz (2k cases each -- nightly)
     if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
@@ -97,6 +120,34 @@ jobs:
         env:
           FUZZ_ITERATIONS: 2000
 
+  deep-fuzz-pr:
+    name: Deep Fuzz (500 cases each -- PR)
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    defaults:
+      run:
+        working-directory: contracts
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: 1.91.0
+          targets: wasm32v1-none
+          components: rustfmt, clippy
+
+      - name: Cache Rust dependencies
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: contracts
+
+      - name: Run deep fuzz tests
+        run: cargo test --features testutils -- fuzz
+        env:
+          FUZZ_ITERATIONS: 500
+
   coverage:
     name: Coverage (tarpaulin)
     if: github.event_name == 'pull_request'