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Oleksandr Bezdieniezhnykh
8fca6e0209
Closes the cycle-8 Medium DoS finding. Without the cap, an authenticated caller could submit millions of bbox polygons in a single 500 MiB request (Kestrel global limit) and saturate the FluentValidation allocator on the validator hot path; each polygon is ~90 bytes of JSON, so the body limit is not a useful gate. Realistic use is 1-10 polygons per route — 50 leaves 5x headroom while bounding the worst-case allocation. Layers: - CreateRouteRequestValidator: MaxPolygons = 50 + Must(...) chained before RuleForEach so the count error fires at "geofences.polygons" (not the leaf path). - Unit: Validate_GeofencePolygonsTooMany_FailsCountRule. - Integration: GeofencePolygonsTooMany_Returns400 (51 valid bbox polygons -> HTTP 400 + errors["geofences.polygons"]). - Contract: route-creation.md -> v1.0.1 patch (tightening an existing range). New Inv-10, new geofence-polygons-too-many test case, changelog row. - Test spec: BT-29 sub-case 9b + AZ-809 AC-1b row in the traceability matrix. - Security report: F-AZ809-1 marked RESOLVED in cycle 8; verdict remains PASS_WITH_WARNINGS (Lows + carry-overs unchanged). Co-authored-by: Cursor <cursoragent@cursor.com>