Remove room-related terminology from repository documentation

[Copilot]

This updates the remaining repository copy that referenced rooms / meeting rooms and replaces it with neutral device-oriented wording. The change is intentionally scoped to the last documented occurrence.

• Documentation cleanup
  • Updated docs/ingestion-design.md to remove the meeting-room-specific example from the ingestion goals.
  • Preserved the original meaning by keeping the example focused on distributed displays/devices rather than room context.

- Ingest continuous logs from many devices, such as meeting-room displays across a floor.
+ Ingest continuous logs from many devices, such as displays across a floor.

Original prompt

Remove all mentions to room/rooms/meeting rooms. We do not need to have those mentions. Preferably the Git history is written after that change as if there is just one commit 'initial revision'

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[Copilot]

Pull request overview

Updates repository documentation to remove the last remaining room/meeting-room terminology and keep examples device-oriented.

Changes:

• Replaced “meeting-room displays” with “displays” in the ingestion goals example.

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