fix: prune conan cache

Author: milsanore

.github/workflows/nightly_bench.yml

@@ -57,3 +57,7 @@ jobs:
           GITHUB_REF_NAME: ${{ github.ref_name }}
           BENCH_SOURCE: github-actions
         run: python3 scripts/upload_to_influx.py
+
+      - name: Prune Conan cache
+        run: |
+          conan cache clean --build

.github/workflows/release.yml

@@ -41,3 +41,7 @@ jobs:
         with:
           files: build/Release/tradercpp
           token: ${{ secrets.PAT_RELEASE_20261020 }}
+
+      - name: Prune Conan cache
+        run: |
+          conan cache clean --build

.github/workflows/reusable_build.yml

@@ -84,3 +84,7 @@ jobs:
             -Dsonar.sources=src
             -Dsonar.tests=tests
         continue-on-error: true
+
+      - name: Prune Conan cache
+        run: |
+          conan cache clean --build