chore: rename cameleer3 to cameleer

Rename Java packages from com.cameleer3 to com.cameleer, module
directories from cameleer3-* to cameleer-*, and all references
throughout workflows, Dockerfiles, docs, migrations, and pom.xml.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -1,14 +1,14 @@
 FROM --platform=$BUILDPLATFORM maven:3.9-eclipse-temurin-17 AS build
 WORKDIR /build
 
-# Configure Gitea Maven Registry for cameleer3-common dependency
+# Configure Gitea Maven Registry for cameleer-common dependency
 ARG REGISTRY_TOKEN
 RUN mkdir -p ~/.m2 && \
     echo '<settings><servers><server><id>gitea</id><username>cameleer</username><password>'${REGISTRY_TOKEN}'</password></server></servers></settings>' > ~/.m2/settings.xml
 
 COPY pom.xml .
-COPY cameleer3-server-core/pom.xml cameleer3-server-core/
-COPY cameleer3-server-app/pom.xml cameleer3-server-app/
+COPY cameleer-server-core/pom.xml cameleer-server-core/
+COPY cameleer-server-app/pom.xml cameleer-server-app/
 # Cache deps — only re-downloaded when POMs change
 RUN mvn dependency:go-offline -B || true
 COPY . .
@@ -16,7 +16,7 @@ RUN mvn clean package -DskipTests -U -B
 
 FROM eclipse-temurin:17-jre
 WORKDIR /app
-COPY --from=build /build/cameleer3-server-app/target/cameleer3-server-app-*.jar /app/server.jar
+COPY --from=build /build/cameleer-server-app/target/cameleer-server-app-*.jar /app/server.jar
 COPY docker-entrypoint.sh /app/
 RUN chmod +x /app/docker-entrypoint.sh