Fix: Pipeline.RoutePattern not set for inline HTTP trigger pipelines

[Copilot]

• Fix 1: In engine.go configurePipelines, set pipeline.RoutePattern from inline HTTP trigger path config after creating the pipeline
• Fix 2: In module/pipeline_executor.go Execute(), seed _route_pattern from p.RoutePattern if not already in metadata
• Add test: Verify RoutePattern is set for inline HTTP trigger pipelines in engine_pipeline_test.go
• Add test: Verify RoutePattern NOT set when trigger path is empty in engine_pipeline_test.go
• Add test: Verify _route_pattern is seeded in pipeline context in Execute() (module/pipeline_executor_test.go)
• Add test: Verify _route_pattern from p.Metadata takes precedence over p.RoutePattern in Execute()
• Fix test: Use two-value map access _, ok := pc.Metadata["_route_pattern"] to properly assert key absence in TestPipeline_Execute_NoRoutePatternNoMetadata
• Run linter and tests - all pass with no regressions

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[Copilot]

Pull request overview

This PR fixes missing route-pattern propagation for pipelines executed via inline HTTP triggers, ensuring step.request_parse can extract path parameters by seeding _route_pattern into the pipeline execution metadata.

Changes:

• Populate Pipeline.RoutePattern from inline HTTP trigger config.path during configurePipelines.
• Seed _route_pattern from Pipeline.RoutePattern inside Pipeline.Execute when not already present in metadata.
• Add tests covering RoutePattern population and _route_pattern seeding/precedence behavior.

Reviewed changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
engine.go	Sets pipeline.RoutePattern from inline HTTP trigger path during pipeline configuration.
module/pipeline_executor.go	Seeds _route_pattern into execution metadata from Pipeline.RoutePattern when missing.
engine_pipeline_test.go	Adds tests verifying RoutePattern is set (or not set) for inline HTTP triggers.
module/pipeline_executor_test.go	Adds tests for _route_pattern seeding and precedence vs p.Metadata.
module/pipeline_step_base64_decode.go	Formatting/alignment changes only.
module/pipeline_step_webhook_verify.go	Formatting/alignment change only.

[intel352]

@copilot apply changes based on the comments in this thread