feat: complete companies field sync — 4 missing columns + classification mapping

- Migration 060: add bill_to_company_location_id, impersonator_creator_resource_id,
  invoice_non_contract_items_to_parent_company, quote_email_message_id
- entity-mapper: mapCompany() now maps all 57 Autotask API fields incl. classification
- autotask.ts: Company interface expanded to cover all API fields
- data-browser/companies: add Classification column + sort to table;
  expand detail modal with classification, category, owner, territory, market_segment,
  parent_company, create_date

migrations/060_companies_remaining_fields.sql

@@ -0,0 +1,7 @@
+-- Migration 060: Add remaining Autotask API fields to companies table
+
+ALTER TABLE companies
+  ADD COLUMN IF NOT EXISTS bill_to_company_location_id             BIGINT,
+  ADD COLUMN IF NOT EXISTS impersonator_creator_resource_id        BIGINT,
+  ADD COLUMN IF NOT EXISTS invoice_non_contract_items_to_parent_company BOOLEAN,
+  ADD COLUMN IF NOT EXISTS quote_email_message_id                  BIGINT;