feat: Limit accumulating canvas buffer

[abelonogov-ld]

RRWeb Canvas is being updated by draw commands and they all kept in the browser memory. Pr makes SR to reset this Canvas cache by pushing FullSnapshot after 10mb of canvas payloads

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Note

Tracks canvas payload size (~10MB limit) to decide between incremental draws and full snapshots, refactors event data types, and adds SessionReplay tests.

• Session Replay:
  • Enforce RRWeb canvas buffer cap (~10MB) via generatingCanvasSize/pushedCanvasSize; trigger FullSnapshot when exceeded; otherwise issue incremental drawImage.
  • Add RRWebPlayerConstants, track per-event canvasSize, and update size after payload push (updatePushedCanvasSize).
  • Optimize image handling (reuse base64 string, pass rr_dataURL into ExportImage.eventNode).
• RRWeb event model refactor:
  • Replace generic EventData with specific WindowData, MouseInteractionData, MouseMoveEventData, and DomData (with transitional canvasSize).
  • Extend CanvasDrawData/AnyCommand to carry canvasSize; adjust decoding in AnyEventData.
• Exporter:
  • After pushPayload, flush accumulated canvas size in SessionReplayEventGenerator.
• GraphQL:
  • Make GraphQLClient.endpoint private.
• Build & Tests:
  • Add SessionReplayTests target and scheme entry.
  • New tests validate draw vs full snapshot behavior based on canvas buffer limit.

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