feat(calendar): wire custom repeat meta through to backend

Frontend:
- Store CalendarRepeatMeta from custom modal (was silently discarded)
- Map custom kind back to standard RepeatType (Day/Week/Month/Year)
- Send repeatEvery from meta.n (was hardcoded to 1)
- Include repeatEndMode, repeatOccurrences, repeatUntilDate in payload

Backend:
- CalendarTaskCreateRequestModel: add RepeatEndMode, RepeatOccurrences,
  RepeatUntilDate fields
- CreateTask: write end mode fields to AreaRulePlanning after creation
- GetTasksForWeek: filter occurrences by RepeatEndMode — stop after N
  occurrences (mode 1) or past until-date (mode 2)
- CalendarTaskResponseModel: add EformId + ItemPlanningTagId (missing
  from host app copy)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: renemadsen

eFormAPI/Plugins/BackendConfiguration.Pn/BackendConfiguration.Pn/Infrastructure/Models/Calendar/CalendarTaskCreateRequestModel.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using Microting.eForm.Infrastructure.Models;
+
+namespace BackendConfiguration.Pn.Infrastructure.Models.Calendar;
+
+public class CalendarTaskCreateRequestModel
+{
+    public int PropertyId { get; set; }
+    public int? FolderId { get; set; }
+    public int? ItemPlanningTagId { get; set; }
+    public List<int> TagIds { get; set; } = [];
+    public List<CommonTranslationsModel> Translates { get; set; } = [];
+    public int EformId { get; set; }
+    public DateTime StartDate { get; set; }
+    public int RepeatType { get; set; }
+    public int RepeatEvery { get; set; }
+    public int Status { get; set; }
+    public List<int> Sites { get; set; } = [];
+    public bool ComplianceEnabled { get; set; }
+    public double StartHour { get; set; }
+    public double Duration { get; set; }
+    public int? BoardId { get; set; }
+    public string Color { get; set; }
+    public int? RepeatEndMode { get; set; }
+    public int? RepeatOccurrences { get; set; }
+    public DateTime? RepeatUntilDate { get; set; }
+}

eFormAPI/Plugins/BackendConfiguration.Pn/BackendConfiguration.Pn/Infrastructure/Models/Calendar/CalendarTaskResponseModel.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+
+namespace BackendConfiguration.Pn.Infrastructure.Models.Calendar;
+
+public class CalendarTaskResponseModel
+{
+    public int Id { get; set; }
+    public string Title { get; set; }
+    public double StartHour { get; set; }
+    public double Duration { get; set; }
+    public string TaskDate { get; set; }
+    public List<string> Tags { get; set; } = [];
+    public List<int> AssigneeIds { get; set; } = [];
+    public int? BoardId { get; set; }
+    public string Color { get; set; }
+    public int RepeatType { get; set; }
+    public int RepeatEvery { get; set; }
+    public bool Completed { get; set; }
+    public int PropertyId { get; set; }
+    public int? ComplianceId { get; set; }
+    public bool IsFromCompliance { get; set; }
+    public DateTime? Deadline { get; set; }
+    public DateTime? NextExecutionTime { get; set; }
+    public int? PlanningId { get; set; }
+    public bool IsAllDay { get; set; }
+    public int? ExceptionId { get; set; }
+    public int? EformId { get; set; }
+    public int? ItemPlanningTagId { get; set; }
+}