SDK 0.17.0

Added

• Creator platforms and confirmed account relationships. All four SDKs
  now expose GET /platforms, GET /actors/{id}/accounts and
  GET /sites/{id}/owners. Publishing platforms have stable UUIDs, keys and
  titles and are separate from studio-group Networks. Account/owner reads
  return up to 200 confirmed catalogue relationships in deterministic order;
  guest credits do not imply ownership, and private source identities and
  evidence are excluded.
• Platform metadata throughout the catalogue. Site and Video payloads,
  including nested sites, favorite/ignored sites and current-state change
  feeds, gain nullable platformId, platformKey, platformTitle and
  accountHandle. Classic sites carry null platform metadata. Platform and
  owner changes advance the affected Site, Actor and Video feeds so consumers
  can update existing IDs with their current cursors.
• Platform filters for Sites and Videos. GET /sites and GET /videos
  accept PlatformId or ClassicOnly=true; combining them returns the
  existing validation problem response. Existing routes, operation IDs,
  response status declarations and change-feed cursor shapes are preserved.

Known limitations

• Go filtered Video requests require a raw URL. The existing Kiota
  timestamp-query bug also visits unset CreatedAfter and CreatedBefore
  fields, so a typed Video query configuration panics even when only a
  platform filter is set. Use Videos().WithUrl(url).Get(ctx, nil) with
  net/url-encoded filters. The Go README
  includes a compiled example and a regression test covers both filters
  through the authenticated wrapper.

Closes #49 via PR #50. All six CI checks passed, including C# on .NET 8 and .NET 10, TypeScript on Node 22 and 24, and regeneration consistency.