Not seeing session variables

[amalagaura]

Not able to use session variables
We tried adding session variables per the examples in the #544

To Reproduce

bin/julie-ops.jar  --version
4.4.1

context: context
env: dev
projects:
  - name: ksqldb-project
    ksql:
      artefacts:
        vars:
          streamname: ksqlb_stream_name_test
        streams:
          - path: ../ksqldb/test.sql
            name: ksql_test_stream

CREATE STREAM ${streamname}
(
ORGIDKEY STRUCT<ORG_ID INTEGER> KEY,
ORG_ABBR VARCHAR
)
WITH

Expected behavior
Session variables added to KSQLDB request

Screenshots

Following is log from KSQLDB

', configOverrides={}, requestProperties={}, sessionVariables={}, commandSequenceNumber=Optional.empty}, reason:  (io.confluent.ksql.rest.server.resources.KsqlResource)
io.confluent.ksql.parser.exception.ParseFailedException: Illegal argument at Line: 1, Col: 15. Source names may only contain alphanumeric values, '_' or '-'. Got: '${STREAMNAME}'
Statement: CREATE STREAM ${streamname}

Runtime (please complete the following information):
KSQLDB Version: docker.io/confluentinc/cp-ksqldb-server:7.1.0

Additional context
We are able to use variable substitutions in the KSQL-CLI without any issue