Replace status_id with in_progress boolean field

- Remove task_statuses lookup table and StatusID foreign key
- Add InProgress boolean field to Task model
- Add database migration (005_replace_status_with_in_progress)
- Update all handlers, services, and repositories
- Update admin frontend to display in_progress as checkbox/boolean
- Remove Task Statuses tab from admin lookups page
- Update tests to use InProgress instead of StatusID
- Task categorization now uses InProgress for kanban column assignment

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

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

migrations/005_replace_status_with_in_progress.up.sql

@@ -0,0 +1,44 @@
+-- Migration: Replace status_id foreign key with in_progress boolean
+-- This simplifies the task model since status was only used to determine if a task is "In Progress"
+
+-- Step 1: Add in_progress boolean column with default false
+ALTER TABLE task_task ADD COLUMN IF NOT EXISTS in_progress BOOLEAN NOT NULL DEFAULT false;
+
+-- Step 2: Create index on in_progress for query performance
+CREATE INDEX IF NOT EXISTS idx_task_task_in_progress ON task_task(in_progress);
+
+-- Step 3: Migrate existing data - set in_progress = true for tasks with "In Progress" status
+UPDATE task_task
+SET in_progress = true
+WHERE status_id IN (
+    SELECT id FROM task_taskstatus WHERE LOWER(name) = 'in progress'
+);
+
+-- Step 4: Drop the foreign key constraint on status_id (if it exists)
+-- PostgreSQL syntax - the constraint name might vary
+DO $$
+BEGIN
+    -- Try to drop the constraint if it exists
+    IF EXISTS (
+        SELECT 1 FROM information_schema.table_constraints
+        WHERE constraint_name = 'fk_task_task_status'
+        AND table_name = 'task_task'
+    ) THEN
+        ALTER TABLE task_task DROP CONSTRAINT fk_task_task_status;
+    END IF;
+
+    -- Also try the gorm auto-generated constraint name
+    IF EXISTS (
+        SELECT 1 FROM information_schema.table_constraints
+        WHERE constraint_name = 'task_task_status_id_fkey'
+        AND table_name = 'task_task'
+    ) THEN
+        ALTER TABLE task_task DROP CONSTRAINT task_task_status_id_fkey;
+    END IF;
+END $$;
+
+-- Step 5: Drop the status_id column
+ALTER TABLE task_task DROP COLUMN IF EXISTS status_id;
+
+-- Step 6: Drop the task_taskstatus table
+DROP TABLE IF EXISTS task_taskstatus;