Fix: Support trigger_pause_status preset in alerts (databricks#4323)

## Changes

Apply the `trigger_pause_status` preset to SQL Alerts, similar to how
it's already applied to Jobs and Pipelines.

## Why

Fixes databricks#4316. SQL Alerts were ignoring the `trigger_pause_status` preset
configured at the target level, while Jobs correctly respected it. This
caused alerts to remain unpaused even when `trigger_pause_status:
PAUSED` was set.

## Tests

Added unit tests covering:
- Alert with schedule (no explicit pause_status) → gets paused by preset
- Alert with schedule and explicit `UNPAUSED` → remains unpaused  
- Alert without schedule → pause_status remains empty

Also, manually tested that this works as expected.

Author: shreyas-goenka

NEXT_CHANGELOG.md

@@ -8,6 +8,7 @@
 
 * Improve performance of `databricks fs cp` command by parallelizing file uploads when
   copying directories with the `--recursive` flag.
+* Fix: Support trigger_pause_status preset in alerts ([#4323](https://github.com/databricks/cli/pull/4323))
 
 ### Bundles
 

bundle/config/mutator/resourcemutator/apply_presets.go

@@ -239,12 +239,22 @@ func (m *applyPresets) Apply(ctx context.Context, b *bundle.Bundle) diag.Diagnos
 
 	// Apps: No presets
 
-	// Alerts: Prefix
+	// Alerts: Prefix, TriggerPauseStatus
 	for _, a := range r.Alerts {
 		if a == nil {
 			continue
 		}
 		a.DisplayName = prefix + a.DisplayName
+		if t.TriggerPauseStatus != "" {
+			paused := sql.SchedulePauseStatusPaused
+			if t.TriggerPauseStatus == config.Unpaused {
+				paused = sql.SchedulePauseStatusUnpaused
+			}
+			// Only set pause status if a schedule is defined and pause status is not already set
+			if a.Schedule.QuartzCronSchedule != "" && a.Schedule.PauseStatus == "" {
+				a.Schedule.PauseStatus = paused
+			}
+		}
 	}
 
 	// SQL Warehouses: Prefix, Tags

bundle/config/mutator/resourcemutator/apply_target_mode_test.go

@@ -191,6 +191,23 @@ func mockBundle(mode config.Mode) *bundle.Bundle {
 					"alert1": {
 						AlertV2: sql.AlertV2{
 							DisplayName: "alert1",
+							Schedule: sql.CronSchedule{
+								QuartzCronSchedule: "0 0 12 * * ?",
+							},
+						},
+					},
+					"alert2": {
+						AlertV2: sql.AlertV2{
+							DisplayName: "alert2",
+							Schedule: sql.CronSchedule{
+								QuartzCronSchedule: "0 0 12 * * ?",
+								PauseStatus:        sql.SchedulePauseStatusUnpaused,
+							},
+						},
+					},
+					"alert3": {
+						AlertV2: sql.AlertV2{
+							DisplayName: "alert3",
 						},
 					},
 				},
@@ -258,6 +275,18 @@ func TestProcessTargetModeDevelopment(t *testing.T) {
 
 	// Dashboards
 	assert.Equal(t, "[dev lennart] dashboard1", b.Config.Resources.Dashboards["dashboard1"].DisplayName)
+
+	// Alert 1: has schedule without pause status set - should be paused
+	assert.Equal(t, "[dev lennart] alert1", b.Config.Resources.Alerts["alert1"].DisplayName)
+	assert.Equal(t, sql.SchedulePauseStatusPaused, b.Config.Resources.Alerts["alert1"].Schedule.PauseStatus)
+
+	// Alert 2: has schedule with pause status already set to unpaused - should remain unpaused
+	assert.Equal(t, "[dev lennart] alert2", b.Config.Resources.Alerts["alert2"].DisplayName)
+	assert.Equal(t, sql.SchedulePauseStatusUnpaused, b.Config.Resources.Alerts["alert2"].Schedule.PauseStatus)
+
+	// Alert 3: no schedule - pause status should remain empty
+	assert.Equal(t, "[dev lennart] alert3", b.Config.Resources.Alerts["alert3"].DisplayName)
+	assert.Empty(t, b.Config.Resources.Alerts["alert3"].Schedule.PauseStatus)
 }
 
 func TestProcessTargetModeDevelopmentTagNormalizationForAws(t *testing.T) {