license switch agpl -> busl1, sprints work, new product advisories

docs/api/proofs-openapi.yaml

@@ -10,8 +10,8 @@ info:
     assessments through attestable DSSE envelopes.
 
   license:
-    name: AGPL-3.0-or-later
-    url: https://www.gnu.org/licenses/agpl-3.0.html
+    name: BUSL-1.1
+    url: https://spdx.org/licenses/BUSL-1.1.html
 
 servers:
   - url: https://api.stellaops.dev/v1