Initial commit: FieldLogger MAUI app with Maglink BLE support

Added Maglink RTK GNSS receiver integration with correct BLE UUIDs and device name filtering (ML-* prefix).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

FieldLogger/Models/Job.cs

@@ -0,0 +1,23 @@
+using SQLite;
+
+namespace FieldLogger.Models;
+
+[Table("jobs")]
+public sealed class Job
+{
+    [PrimaryKey, AutoIncrement]
+    public int Id { get; set; }
+
+    [NotNull]
+    public string Name { get; set; } = "";
+
+    public string Notes { get; set; } = "";
+
+    public DateTime CreatedUtc { get; set; } = DateTime.UtcNow;
+
+    /// <summary>Reserved for MQTT sync: server-side job identifier once provisioned remotely.</summary>
+    public string? RemoteId { get; set; }
+
+    /// <summary>Reserved for MQTT sync: true once all points have been pushed to the server.</summary>
+    public bool Synced { get; set; }
+}