Backend: ExtractParameters() now discovers query params from [AsParameters]
records and [FromQuery] attributes via handler method reflection. Gateway
OpenApiDocumentGenerator emits parameters arrays in the aggregated spec.
QueryParameterInfo added to EndpointSchemaInfo for HELLO payload transport.
Frontend: Remaining spec files and straggler services updated to canonical
X-Stella-Ops-* header names. Sprint 026 archived (tasks 01-06 DONE,
07-09 TODO for backend service rename pass).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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