Run FOSSA scan

Author: trask

.github/repository-settings.md

@@ -112,6 +112,7 @@ settings](https://github.com/open-telemetry/community/blob/main/docs/how-to-conf
 
 ### Repository secrets
 
+- `FOSSA_API_KEY` - stored in OpenTelemetry-Java 1Password
 - `GPG_PASSWORD` - stored in OpenTelemetry-Java 1Password
 - `GPG_PRIVATE_KEY` - stored in OpenTelemetry-Java 1Password
 - `GRADLE_PUBLISH_KEY`

.github/workflows/fossa.yml

@@ -0,0 +1,24 @@
+name: FOSSA
+
+# Ensures that this is only run once, either when pushing
+# directly to main OR when pushing to a PR against main.
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  fossa:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      - uses: fossas/fossa-action@93a52ecf7c3ac7eb40f5de77fd69b1a19524de94 # v1.5.0
+        with:
+          api-key: ${{secrets.FOSSA_API_KEY}}