Luma integration for welcoming attendees

[Prachi1615]

This PR introduces the following-

• Add QR Scanner input plugin (QRScanner / QRScannerRTSP) that decodes Luma check-in QR codes from camera or RTSP stream
• Add Luma API client (internal/providers/luma) to look up guest details by ticket key
• Scanner enriches QR scans with guest name and personalized greeting before emitting to prompt, so the LLM can repeat the exact greeting via speak action
• Includes debouncing to avoid repeated greetings for the same guest within a configurable window
• Add configs for local dev (luma_checkin_local), Go2/Thor (luma_checkin_go2), and production (luma_checkin)

[Copilot]

Pull request overview

Adds a new QR-scanner input plugin that decodes Luma check-in QR codes, optionally enriches scans via Luma’s public API into a deterministic greeting string, and introduces new configs for “greeter” modes; also adjusts FFmpeg camera capture behavior and logging for debugging.

Changes:

• Introduce QRScanner / QRScannerRTSP input plugins with QR decode + dedupe + optional Luma enrichment (and optional direct TTS path).
• Add an internal Luma API client (/v1/event/get-guest) plus unit tests for URL parsing, decoding, debouncing, and greeting formatting.
• Update FFmpeg camera capture defaults/logging and add new mode configs for Luma check-in.

Reviewed changes

Copilot reviewed 17 out of 18 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
plugins/inputs/qr_scanner/url_parse.go	Parse Luma check-in URLs into (eventID, pk) for scan validation.
plugins/inputs/qr_scanner/url_parse_test.go	Tests for Luma URL parsing behavior and edge cases.
plugins/inputs/qr_scanner/qr_scanner.go	Main QR scanner sensor implementation (capture, decode, dedupe, enrich, emit).
plugins/inputs/qr_scanner/format_scan_message_test.go	Tests for scan formatting, Luma lookup outcomes, and direct-TTS path.
plugins/inputs/qr_scanner/export_test.go	Test-only exports/helpers/fakes for black-box style tests.
plugins/inputs/qr_scanner/decode.go	JPEG QR decoding via gozxing.
plugins/inputs/qr_scanner/decode_test.go	Round-trip and “blank frame” tests for QR decode.
plugins/inputs/qr_scanner/debounce.go	Dedupe/debounce implementation for repeated PKs.
plugins/inputs/qr_scanner/debounce_test.go	Tests for debounce windowing and pruning.
plugins/inputs/inputs.go	Registers the new qr_scanner input plugin via blank import.
internal/providers/vlm/vlm_test.go	Updates expectations for NewVideoStream default config behavior.
internal/providers/vlm/video_stream.go	Removes forced FPS/size defaults; adds FFmpeg stderr piping/logging; adjusts args emission.
internal/providers/luma/client.go	Adds Luma public API client for guest lookup and greeting templating helpers.
go.mod	Adds gozxing dependency (QR decoding) and related indirect deps.
go.sum	Records checksums for newly added dependencies.
config/luma_checkin.json5	New production greeter mode config using QR scanner + Luma enrichment.
config/luma_checkin_local.json5	New local dev greeter config.
config/luma_checkin_go2.json5	New Go2/Thor greeter config using RTSP input.
config/conversation.json5	Adds explicit VLM input camera config (fps/resolution).

[codecov]

Codecov Report

❌ Patch coverage is 33.49206% with 419 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
plugins/inputs/luma_checkin/luma_checkin.go	1.47%	200 Missing ⚠️
plugins/backgrounds/luma/guest_lingering.go	2.50%	78 Missing ⚠️
plugins/backgrounds/luma/luma_checkin.go	47.29%	39 Missing ⚠️
plugins/inputs/checkin_status.go	5.40%	35 Missing ⚠️
internal/providers/luma/client.go	78.07%	16 Missing and 9 partials ⚠️
plugins/backgrounds/luma/face_size_watch.go	57.89%	24 Missing ⚠️
internal/hooks/greeting_hook.go	0.00%	10 Missing ⚠️
plugins/inputs/luma_checkin/decode.go	66.66%	2 Missing and 2 partials ⚠️
internal/hooks/luma_hook.go	50.00%	2 Missing ⚠️
plugins/inputs/luma_checkin/url_parse.go	87.50%	1 Missing and 1 partial ⚠️

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