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>

deploy/cameleer-postgres.yaml

@@ -26,7 +26,7 @@ spec:
               name: cameleer-pg
           env:
             - name: POSTGRES_DB
-              value: cameleer3
+              value: cameleer
             - name: POSTGRES_USER
               valueFrom:
                 secretKeyRef:
@@ -52,7 +52,7 @@ spec:
               command:
                 - sh
                 - -c
-                - pg_isready -U "$POSTGRES_USER" -d cameleer3
+                - pg_isready -U "$POSTGRES_USER" -d cameleer
             initialDelaySeconds: 15
             periodSeconds: 10
             timeoutSeconds: 3
@@ -62,7 +62,7 @@ spec:
               command:
                 - sh
                 - -c
-                - pg_isready -U "$POSTGRES_USER" -d cameleer3
+                - pg_isready -U "$POSTGRES_USER" -d cameleer
             initialDelaySeconds: 5
             periodSeconds: 5
             timeoutSeconds: 3