Revert infra fixes (will be fixed upstream)

Revert Dockerfile, poetry.lock, and license header
changes — these are pre-existing issues on develop.

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

Author: 2 people

dev/hive/Dockerfile

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM eclipse-temurin:8-jre AS build
+FROM openjdk:8-jre-slim AS build
 
 RUN apt-get update -qq && apt-get -qq -y install curl