feat: add mapped ALPR cameras with bounded source loading

Adapt the ALPR camera contribution to reusable layer components, retaining source attribution, bounded queries, selection and voice controls.

Co-authored-by: Bilawal Sidhu <[email protected]>

DATA_SOURCES.md

@@ -15,6 +15,7 @@ How to read this:
 
 | Source | Used for | License / terms | Attribution |
 |--------|----------|-----------------|-------------|
+| **OpenStreetMap ALPR camera locations** (including DeFlock community mapping) | Optional mapped automatic license-plate-reader camera layer | [ODbL 1.0](https://opendatacommons.org/licenses/odbl/1-0/); commercial use permitted with applicable attribution and database share-alike obligations | [© OpenStreetMap contributors](https://www.openstreetmap.org/copyright); [DeFlock](https://deflock.org) community mapping |
 | **Google Map Tiles API** (Photorealistic 3D Tiles) + Places/Geocoding | The 3D globe, voice scene context, and on-demand nearby installation search | Google Maps Platform ToS (proprietary, your own key + billing) | "Google" / "Google Maps" logo — **shown in-app**, required |
 | **OpenSky Network** | Primary worldwide live-flight snapshot | Non-commercial research/education license | Schäfer et al., *"Bringing Up OpenSky"*, IPSN 2014 + opensky-network.org |
 | **adsb.lol point API** | Bounded live-flight fallback when OpenSky has no usable snapshot | ODbL 1.0 | adsb.lol contributors; `api.adsb.lol/v2/lat/{lat}/lon/{lon}/dist/{radius}` |
@@ -75,6 +76,32 @@ The submarine-cable GeoJSON is **CC BY-NC-SA 3.0** (Attribution-**NonCommercial*
 
 The richer structured dataset is licensed separately/commercially by TeleGeography.
 
+### ALPR camera mapping
+
+The optional ALPR layer queries OpenStreetMap nodes tagged `man_made=surveillance`
+and `surveillance:type=ALPR` (including case-insensitive semicolon multi-values)
+through the shared Overpass proxy. Source/tag reference:
+[OSM ALPR tagging](https://wiki.openstreetmap.org/wiki/Tag:surveillance:type%3DALPR).
+No DeFlock software, branded assets or separate database is bundled. The layer
+shows contributor-supplied locations and tags, not plate records, camera video,
+current operating status, or exhaustive coverage. All manufacturers share the
+ALPR category and marker color. Manufacturer, operator and camera type are shown
+only when tagged, not inferred or independently verified. Every selected card
+names OpenStreetMap in a smaller, muted source line beneath those details.
+
+Queries are limited to a city-scale viewport (at most 3° per axis), at most
+1,500 returned nodes, with outward-snapped query reuse and explicit stale/limited
+coverage notices. A linked © OpenStreetMap credit appears for five
+seconds when camera locations first display after enabling, then collapses;
+Data attribution retains the full source/license entry, following the
+[OSMF interactive-map guidance](https://osmfoundation.org/wiki/Licence/Attribution_Guidelines).
+OSM data remains separately attributed under ODbL; querying
+at runtime does not replace the license obligations. ODbL permits commercial
+use and does not license the application code. If publicly using a derivative
+database, follow its share-alike and access requirements; keep independent
+datasets separate rather than treating the whole collection as MIT data.
+Overpass hosting capacity and usage policies are separate from the data license.
+
 ### ODbL share-alike (datacenters, dams)
 
 The OSM-derived datasets are under the **Open Database License**. ODbL's share-alike applies to the **data / derived database, not this MIT-licensed code** — the two coexist (exactly how Open Infrastructure Map ships: MIT software + ODbL data). If you publicly distribute a *modified* version of these databases, you must offer it under ODbL. Keep the "© OpenStreetMap contributors" notice (link: https://www.openstreetmap.org/copyright).