[MartijnVisser]

What is the purpose of the change

Fix the code examples on the procedures page that don't compile or run.

Brief change log

• Fix the Java and Scala tabs that don't compile
• Make each Scala tab do what its Java tab does; the old first one used Double* varargs, which runs into FLINK-41476
• Add the missing else in the @ProcedureHint Scala tab, which failed at runtime

Verifying this change

This change has been tested locally by compiling every tab of the English and Chinese pages against master snapshot jars and calling the procedures with CALL. The Scala and Java tabs return the same types and results.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): no
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? not applicable

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Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

Generated-by: Claude Code (Claude Opus 5.5)

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CI report:

• fade84a Azure: SUCCESS

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