feat: add project_phases entity sync with task project_id backfill

The Autotask Tasks bulk API does not return projectID in its response,
causing all tasks.project_id to be NULL. This fixes it by:

- Adding project_phases as a synced entity (Autotask endpoint: /Phases)
- Migration 059: project_phases table with project_id, phase_number,
  estimated_hours, start/due dates, parent_phase_id, is_scheduled
- EntityType.PROJECT_PHASES added to all sync maps and dependency graph
  (depends on PROJECTS, runs before TASKS in sync order)
- buildProjectPhasesFilter: Phases endpoint requires a filter (id > 0)
- mapProjectPhase: maps Autotask field names to DB columns
- Post-sync backfill in syncEntity: after each project_phases sync,
  UPDATE tasks SET project_id = pp.project_id FROM project_phases pp
  JOIN projects p WHERE tasks.phase_id = pp.id
  Only backfills where the project exists in our DB (FK constraint on
  tasks.project_id; archived projects are skipped gracefully)

Result: 2,455 of 4,966 tasks now have project_id populated. Tasks
belonging to archived/completed projects have phase_id resolvable via
project_phases even when project_id remains NULL.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/utils/sync-helpers.ts

@@ -61,6 +61,7 @@ export function getAllEntitiesInOrder(): EntityType[] {
     EntityType.TICKET_CATEGORIES,
     EntityType.CONTACTS,
     EntityType.PROJECTS,
+    EntityType.PROJECT_PHASES,
     EntityType.TICKETS,
     EntityType.TASKS,
     EntityType.CONFIGURATION_ITEMS,
@@ -126,6 +127,7 @@ export function getAutotaskEntityName(entity: EntityType): string {
     [EntityType.TICKET_NOTES]: 'TicketNotes',
     [EntityType.TAG_GROUPS]: 'TagGroups',
     [EntityType.TAGS]: 'Tags',
+    [EntityType.PROJECT_PHASES]: 'Phases',
   };
 
   return mapping[entity] || entity;
@@ -177,6 +179,7 @@ export function getLastModifiedField(entity: EntityType): string {
     [EntityType.TICKET_CATEGORIES]: 'lastModifiedDate',
     [EntityType.TAG_GROUPS]: 'lastModifiedDate',
     [EntityType.TAGS]: 'lastModifiedDateTime',
+    [EntityType.PROJECT_PHASES]: 'lastActivityDateTime',
   };
 
   return mapping[entity] || 'lastModifiedDate';
@@ -211,6 +214,7 @@ export function getActiveField(entity: EntityType): string | null {
     [EntityType.TICKET_CATEGORIES]: 'isActive',
     [EntityType.TAG_GROUPS]: 'isActive',
     [EntityType.TAGS]: 'isActive',
+    [EntityType.PROJECT_PHASES]: null, // No active field on phases
   };
 
   return mapping[entity] || null;
@@ -305,6 +309,7 @@ export function buildDateRangeFilter(
     [EntityType.QUEUES]: null,
     [EntityType.PRIORITIES]: null,
     [EntityType.TICKET_CATEGORIES]: null,
+    [EntityType.PROJECT_PHASES]: null,
   };
 
   const dateField = dateFieldMapping[entity];
@@ -347,6 +352,20 @@ export function buildContractsFilter(): Array<{ field: string; op: string; value
   ];
 }
 
+/**
+ * Build filter for project phases (Phases endpoint requires a filter)
+ * @returns Query filter array for all phases
+ */
+export function buildProjectPhasesFilter(): Array<{ field: string; op: string; value: any }> {
+  return [
+    {
+      field: 'id',
+      op: 'gt',
+      value: 0,
+    },
+  ];
+}
+
 /**
  * Build special filter for projects (requires status filter)
  * @returns Query filter array for active projects
@@ -498,6 +517,7 @@ export function getEntityDisplayName(entity: EntityType): string {
     [EntityType.TICKET_NOTES]: 'Ticket Notes',
     [EntityType.TAG_GROUPS]: 'Tag Groups',
     [EntityType.TAGS]: 'Tags',
+    [EntityType.PROJECT_PHASES]: 'Project Phases',
   };
 
   return mapping[entity] || entity;