Test system function service discovery

[velo]

No description provided.

[Copilot]

Pull Request Overview

The PR introduces a test system function along with updates to docker-compose configurations and system function setup in the SQL executor.

• Added a new system function (Upper) to convert strings to uppercase.
• Updated docker-compose volume mounts for test classes and added jar mappings.
• Introduced additional logging and exception handling around automatic system function registration.

Reviewed Changes

Copilot reviewed 4 out of 7 changed files in this pull request and generated 2 comments.

File	Description
src/test/resources/systemfunction/src/main/java/sample/Upper.java	Added system function implementation with a doc comment that needs to be updated to reflect functionality.
src/test/docker/docker-compose.yml	Updated volume mounts for schema, libraries, and jar files to support test configurations.
src/main/java/com/datasqrl/SqlExecutor.java	Added logging for system function registration and enhanced exception handling.

Files not reviewed (3)

• pom.xml: Language not supported
• src/test/resources/sql/flink.sql: Language not supported
• src/test/resources/systemfunction/pom.xml: Language not supported

Comments suppressed due to low confidence (2)

src/test/docker/docker-compose.yml:33

• The path to the Postgres schema file has been changed to './test-classes/sqrl/postgres-schema.sql'. Please verify that this update aligns with your project structure and test environment configuration.

- ./sqrl/postgres-schema.sql:/docker-entrypoint-initdb.d/database-schema.sql:ro

src/test/docker/docker-compose.yml:67

• New volume mounts for jar files have been added. Please ensure that the paths and jar versions are correct and consistent with the deployment environment.

- ./flink-sql-runner-1.0.0-SNAPSHOT-service.jar:/opt/flink/lib/flink-sql-runner-service.jar