fix(driver-focas): resolve Low code-review findings (Driver.FOCAS-007,008,009,010,011)

- Driver.FOCAS-007: optional ILogger<FocasDriver> + alarm-projection
  logger; log Debug around every formerly-empty catch (probe / shutdown
  / fixed-tree / recycle / alarms-read / projection).
- Driver.FOCAS-008: cache the parsed FocasAddress per tag at
  InitializeAsync; Read/WriteAsync look it up instead of re-parsing on
  every call.
- Driver.FOCAS-009: ProbeLoopAsync now wraps client.ProbeAsync in a
  linked CTS honouring Probe.Timeout so a hung CNC socket can't block
  past the configured limit.
- Driver.FOCAS-010: FocasOperationModeExtensions.ToText delegates to
  FocasOpMode.ToText — single canonical op-mode label surface.
- Driver.FOCAS-011: FocasAlarmType constants are typed short to match
  the cnc_rdalmmsg2 wire field and the projection switch arms.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS/IFocasClient.cs

@@ -272,16 +272,22 @@ public sealed class UnimplementedFocasClientFactory : IFocasClientFactory
 ///     Well-known FOCAS alarm types from <c>fwlib32.h</c> <c>ALM_TYPE_*</c>. Narrow subset —
 ///     the full list is ~15 types per model; these cover the universally-present categories.
 /// </summary>
+/// <remarks>
+///     Constants are typed <see cref="short"/> so they match the wire field width on
+///     <c>cnc_rdalmmsg2</c> (and so <see cref="FocasAlarmProjection"/>'s <c>switch (short)</c>
+///     statements compile against a matching type rather than relying on implicit int→short
+///     narrowing on the constants).
+/// </remarks>
 public static class FocasAlarmType
 {
     /// <summary>Pass to <see cref="IFocasClient.ReadAlarmsAsync"/>-equivalent to mean "any type".</summary>
-    public const int All = -1;
-    public const int Parameter = 0;   // ALM_P
-    public const int PulseCode = 1;   // ALM_Y (servo)
-    public const int Overtravel = 2;  // ALM_O
-    public const int Overheat = 3;    // ALM_H
-    public const int Servo = 4;       // ALM_S
-    public const int DataIo = 5;      // ALM_T
-    public const int MemoryCheck = 6; // ALM_M
-    public const int MacroAlarm = 13; // ALM_MC — used by #3006 etc.
+    public const short All = -1;
+    public const short Parameter = 0;   // ALM_P
+    public const short PulseCode = 1;   // ALM_Y (servo)
+    public const short Overtravel = 2;  // ALM_O
+    public const short Overheat = 3;    // ALM_H
+    public const short Servo = 4;       // ALM_S
+    public const short DataIo = 5;      // ALM_T
+    public const short MemoryCheck = 6; // ALM_M
+    public const short MacroAlarm = 13; // ALM_MC — used by #3006 etc.
 }