feat(streams-bootstrap): add KEDA triggers and scaling modifiers

[raphala]

No description provided.

[Copilot]

Pull request overview

Adds first-class support for configuring KEDA autoscaling behavior (explicit triggers, additional triggers, and composite metric scaling modifiers) for streams-bootstrap-based apps, and updates the generated schema/docs and tests accordingly.

Changes:

• Extend StreamsAppAutoScaling to support triggers (override generated Kafka lag triggers) and scaling_modifiers (KEDA composite metrics).
• Add/expand tests for autoscaling trigger and scaling modifier generation for StreamsApp and ConsumerApp.
• Update JSON schemas and documentation examples/defaults to reflect the new autoscaling fields and semantics.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/components/streams_bootstrap/test_streams_app.py	Adds generation tests for triggers, additionalTriggers, and scalingModifiers in StreamsApp autoscaling values.
tests/components/streams_bootstrap/test_consumer_app.py	Adds generation test for triggers + scalingModifiers in ConsumerApp autoscaling values.
kpops/components/streams_bootstrap/common/model.py	Extends the autoscaling model with triggers, typed additional_triggers, and scaling_modifiers.
docs/docs/schema/pipeline.json	Updates published schema: additionalTriggers item type and adds triggers/scalingModifiers fields and descriptions.
docs/docs/schema/defaults.json	Mirrors pipeline schema updates for defaults schema output.
docs/docs/resources/pipeline-defaults/defaults.yaml	Updates default examples for consumer-app and streams-app autoscaling fields and comments.
docs/docs/resources/pipeline-defaults/defaults-streams-app.yaml	Updates streams-app defaults example to include triggers/additionalTriggers/scalingModifiers guidance.
docs/docs/resources/pipeline-defaults/defaults-consumer-app.yaml	Updates consumer-app defaults example to include triggers/additionalTriggers/scalingModifiers guidance.
docs/docs/resources/pipeline-components/streams-app.yaml	Updates streams-app component example values for the new autoscaling fields.
docs/docs/resources/pipeline-components/sections/values-streams-app.yaml	Updates streams-app values section snippet for the new autoscaling fields.
docs/docs/resources/pipeline-components/sections/values-consumer-app.yaml	Updates consumer-app values section snippet for the new autoscaling fields.
docs/docs/resources/pipeline-components/pipeline.yaml	Updates pipeline example(s) for consumer-app and streams-app autoscaling values.
docs/docs/resources/pipeline-components/consumer-app.yaml	Updates consumer-app component example values for the new autoscaling fields.

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