ci(actions): add parallel linux fuzz job

.gitea/workflows/build.yml

@@ -42,3 +42,36 @@ jobs:
 
       - name: Run unit tests
         run: ./demo/build/ikv_tests
+
+  linux-fuzz:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install build tools
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y build-essential coreutils
+
+      - name: Build fuzz target
+        run: |
+          mkdir -p demo/build
+          gcc -std=c11 -Wall -Wextra -pedantic \
+            -fsanitize=address,undefined \
+            -fno-omit-frame-pointer \
+            -Iinclude \
+            demo/fuzz.c \
+            src/ikv.c \
+            src/loaders/ikv1.c \
+            src/loaders/ikv2.c \
+            -o demo/build/ikv_fuzz
+
+      - name: Smoke check fuzz target
+        run: |
+          timeout 15s ./demo/build/ikv_fuzz
+
+      - name: Fuzz for 10 minutes
+        run: |
+          timeout 10m ./demo/build/ikv_fuzz