Add text input type to checklist items for measurements

Checklist items can now be either 'checkbox' (tick/untick) or 'input'
(text value with optional unit). Useful for recording measurements
like RPM, wow & flutter, torque, voltage, dB levels, etc.

- itemType and unit fields on template_items and checklist_items
- Template page shows type selector and unit field when adding items
- Device checklist renders input items as labeled text fields with unit
- Save button persists measured values
- Import copies item types and units from templates

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

src/lib/server/db/schema.ts

@@ -213,6 +213,8 @@ export const templateItems = pgTable(
 			.notNull()
 			.references(() => checklistTemplates.id, { onDelete: 'cascade' }),
 		text: text('text').notNull(),
+		itemType: text('item_type').notNull().default('checkbox'), // 'checkbox' or 'input'
+		unit: text('unit'), // e.g. 'RPM', 'dB', '%'
 		sortOrder: integer('sort_order').default(0).notNull()
 	},
 	(table) => [index('template_items_template_idx').on(table.templateId)]
@@ -241,7 +243,10 @@ export const checklistItems = pgTable(
 			.notNull()
 			.references(() => deviceChecklists.id, { onDelete: 'cascade' }),
 		text: text('text').notNull(),
+		itemType: text('item_type').notNull().default('checkbox'), // 'checkbox' or 'input'
+		unit: text('unit'), // e.g. 'RPM', 'dB', '%'
 		checked: boolean('checked').default(false).notNull(),
+		value: text('value'), // for input type items
 		sortOrder: integer('sort_order').default(0).notNull(),
 		createdAt: timestamp('created_at', { withTimezone: true }).defaultNow().notNull()
 	},