fix: build.sh must be executable for laconic-so build-containers

Also fix --include filter: container name uses slash (laconicnetwork/agave)
not dash (laconicnetwork-agave). The old filter silently skipped the build.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

playbooks/biscayne-sync-tools.yml

@@ -113,7 +113,7 @@
         {{ laconic_so }}
         --stack {{ stack_path }}
         build-containers
-        --include laconicnetwork-agave
+        --include laconicnetwork/agave
       tags:
         - build-container
         - never