perf: add comprehensive caching to production workflow

.forgejo/workflows/production.yaml

@@ -38,6 +38,13 @@ jobs:
           elixir-version: '1.18.1'
           otp-version: '27.2'
 
+      - name: Cache Mix
+        uses: https://github.com/actions/cache@v4
+        with:
+          path: ~/.mix
+          key: ${{ runner.os }}-mix-1.18.1-27.2
+          restore-keys: ${{ runner.os }}-mix-
+
       - name: Cache deps
         uses: https://github.com/actions/cache@v4
         with:
@@ -108,6 +115,13 @@ jobs:
         with:
           node-version: '20'
 
+      - name: Cache Mix
+        uses: https://github.com/actions/cache@v4
+        with:
+          path: ~/.mix
+          key: ${{ runner.os }}-mix-1.18.1-27.2
+          restore-keys: ${{ runner.os }}-mix-
+
       - name: Cache deps
         uses: https://github.com/actions/cache@v4
         with:
@@ -122,6 +136,20 @@ jobs:
           key: ${{ runner.os }}-build-${{ hashFiles('lib/**/*.ex') }}-${{ hashFiles('mix.lock') }}
           restore-keys: ${{ runner.os }}-build-
 
+      - name: Cache npm
+        uses: https://github.com/actions/cache@v4
+        with:
+          path: e2e/node_modules
+          key: ${{ runner.os }}-npm-${{ hashFiles('e2e/package-lock.json') }}
+          restore-keys: ${{ runner.os }}-npm-
+
+      - name: Cache Playwright browsers
+        uses: https://github.com/actions/cache@v4
+        with:
+          path: ~/.cache/ms-playwright
+          key: ${{ runner.os }}-playwright-${{ hashFiles('e2e/package-lock.json') }}
+          restore-keys: ${{ runner.os }}-playwright-
+
       - name: Install system dependencies
         run: |
           sudo apt-get update