Move HydrophoneLocations into shared DTO, initialize it from Orcasite feeds, and drive email map URI tests from it

[Copilot]

Hydrophone location mappings were defined only in AIForOrcas.Client.Web, while NotificationSystem.Tests.Unit duplicated location-name expectations inline. This change centralizes the mapping in a reusable project, initializes that shared map from Orcasite feed data when available, makes the email map URI tests consume the same initialization path, and trims unused DTO API surface that was introduced during the move.

• Shared hydrophone location mapping

  • Moved HydrophoneLocations from AIForOrcas.Client.Web to AIForOrcas.DTO
  • Kept the API members that have in-repo callers (Initialize, GetIdByLocation, Locations)
  • Removed unused LocationToIdMap and HydrophoneIds properties after verifying they had no callers in the repository

• Orcasite-backed initialization

  • Added an AIForOrcas.DTO reference to NotificationSystem
  • Updated OrcasiteHelper.InitializeAsync() to use the feeds array from Orcasite to build the shared { location name -> node_name } map and call HydrophoneLocations.Initialize(...)
  • Kept the hard-coded DTO mapping as the fallback when the Orcasite API call fails or returns no usable mapping

• NotificationSystem test alignment

  • Added a reference from NotificationSystem.Tests.Unit to AIForOrcas.DTO
  • Replaced InlineData in EmailTemplateTests with MemberData backed by HydrophoneLocations.Locations
  • Derived expected image names from the shared hydrophone IDs via HydrophoneLocations.GetIdByLocation(locationName)
  • Updated the email map URI tests to initialize a real OrcasiteHelper with mocked Orcasite feed data via InitializeAsync() instead of hand-mocking slug lookups

• Effect on duplicated test data

  • Removes hand-maintained test cases that had already drifted from the shared mapping (Mast Center/MaST Center, Haro Strait)
  • Keeps the tests focused on verifying email map URI generation against the same location data path used by the application