Update sink statistics API with pagination and filtering

[hosekpeter]

Jira: XXXXX

Changes:

• Refactored sink statistics API to use a new request type.
• Introduced pagination and filtering options in the API.

PR Overview

This PR updates the sink statistics API to support pagination and filtering by refactoring the request payload and decoder as well as updating the related API design and types. Key changes include:

• Enhancing the decoder to parse new query parameters ("afterId" and "limit") and propagate them to the payload.
• Updating the API design by replacing the GetSinkRequest payload with a new StatisticSinkRequest that includes pagination and filtering options.
• Extending the response and payload types to include pagination information and a not-imported-file filter.

Reviewed Changes

File	Description
internal/pkg/service/stream/api/gen/http/stream/server/encode_decode.go	Updated decoder to handle pagination query parameters and enhanced error aggregation
api/stream/design.go	Modified API design to use the new payload (StatisticSinkRequest) and include new parameters
internal/pkg/service/stream/api/gen/http/stream/server/types.go	Updated response and payload types to include pagination and filtering elements
internal/pkg/service/stream/api/gen/stream/service.go	Added pagination fields and filtering related to not imported files in the service payload

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (2)

api/stream/design.go:1148

• [nitpick] Consider renaming 'StatisticSinkRequest' to 'SinkStatisticsRequest' to better align with the naming conventions used elsewhere in the API.

var StatisticSinkRequest = Type("StatisticSinkRequest", func() {

internal/pkg/service/stream/api/gen/http/stream/server/types.go:3339

• [nitpick] The assignment of NotImportedFiles is performed in two separate conditionals; consider consolidating this logic into a single conditional assignment to improve readability.

if body.NotImportedFiles != nil {