Add reports endpoints for phase 2.

[ggoranov-smar]

Pull Request

Summary

Implements 6 report API endpoints (phase 2):

• GET /reports/{reportId}/scope — list report scope (TokenPaginationResponse<ReportScopeAsset>)
• GET /reports/{reportId}/columns — list report columns (TokenPaginationResponse<ReportColumn>)
• GET /reports/{reportId}/columns/{columnVirtualId} — get single report column
• PUT /reports/{reportId}/columns/{columnVirtualId} — update report column (new UpdateReportColumnRequest model; BaseResponseStatus-wrapped result response)
• DELETE /reports/{reportId}/columns/{columnVirtualId} — delete report column
• GET /reports/{reportId}/definition — get report definition

Checklist

• Read the contribution guide
• Successfully build your changes locally
• Include a title that clearly describes your changes and references relevant issues / backlog items
• Include a summary of your changes
• Include tests for your changes where possible

[coveralls]

Coverage Report for CI Build 29020820228

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Coverage: 95.44%

Details

• Patch coverage: 18 of 18 lines across 1 file are fully covered (100%).

Uncovered Changes

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Coverage Regressions

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Coverage Stats

Relevant Lines:	1289
Covered Lines:	1244
Line Coverage:	96.51%
Relevant Branches:	246
Covered Branches:	221
Branch Coverage:	89.84%
Branches in Coverage %:	Yes
Coverage Strength:	1750.47 hits per line

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