fix(workflows): standardize JSON function usage to fromJSON

- Replace fromJson with fromJSON across all workflow files
- Ensures consistent GitHub Actions function usage
- Affects benchmarks, release, test-suite, and scorecard workflows

Author: mrz1836

.github/workflows/fortress-benchmarks.yml

@@ -50,7 +50,7 @@ jobs:
     timeout-minutes: 30 # Prevent hung benchmarks
     strategy:
       fail-fast: false # Continue running other benchmarks if one fails
-      matrix: ${{ fromJson(inputs.benchmark-matrix) }}
+      matrix: ${{ fromJSON(inputs.benchmark-matrix) }}
     runs-on: ${{ matrix.os }}
 
     steps:

.github/workflows/fortress-release.yml

@@ -38,7 +38,7 @@ on:
         required: true
       slack-webhook:
         description: "Slack webhook URL for notifications"
-        required: true
+        required: false
 
 # ————————————————————————————————————————————————————————————————
 # Permissions

.github/workflows/fortress-test-suite.yml

@@ -65,7 +65,7 @@ jobs:
     timeout-minutes: 30 # Prevent hung tests
     strategy:
       fail-fast: true
-      matrix: ${{ fromJson(inputs.test-matrix) }}
+      matrix: ${{ fromJSON(inputs.test-matrix) }}
     runs-on: ${{ matrix.os }}
 
     steps:

.github/workflows/scorecard.yml

@@ -19,7 +19,9 @@ concurrency:
   cancel-in-progress: true
 
 # Declare default permissions as read-only.
-permissions: read-all
+permissions:
+  contents: read
+  security-events: read # For scorecard analysis
 
 jobs:
   analysis: