feat: Add PostgreSQL fields and workflow for form without files

Database changes:
- Add unified_id, contact_id, phone columns to clpr_claims table
- Create indexes for fast lookup by these fields
- Migrate existing data from payload to new columns
- SQL migration: docs/SQL_ALTER_CLPR_CLAIMS_ADD_FIELDS.sql

SQL improvements:
- Simplify claimsave query: remove complex claim_lookup logic
- Use UPSERT (INSERT ON CONFLICT) with known claim_id
- Always return claim (fix NULL issue)
- Store unified_id, contact_id, phone directly in table columns
- SQL: docs/SQL_CLAIMSAVE_UPSERT_SIMPLE.sql

Workflow enhancements:
- Add branch for form submissions WITHOUT files
- Create 6 new nodes: extract, prepare, save, redis, respond
- Separate flow for has_files=false in IF node
- Instructions: docs/N8N_FORM_GET_NO_FILES_INSTRUCTIONS.md
- Node config: docs/N8N_FORM_GET_NO_FILES_BRANCH.json

Migration stats:
- Total claims: 81
- With unified_id: 77
- Migrated from payload: 2

Next steps:
1. Add 6 nodes to n8n workflow form_get (ID: 8ZVMTsuH7Cmw7snw)
2. Connect TRUE branch of IF node to extract_webhook_data_no_files
3. Test form submission without files
4. Verify PostgreSQL save and Redis event

docs/SQL_ALTER_CLPR_CLAIMS_ADD_FIELDS.sql

@@ -0,0 +1,55 @@
+-- Миграция для добавления полей unified_id, contact_id, phone в таблицу clpr_claims
+-- Дата: 2025-11-21
+-- Описание: Добавляем поля для хранения идентификаторов пользователя напрямую в таблице заявок
+
+-- 1. Добавляем unified_id (уникальный идентификатор пользователя из CRM)
+ALTER TABLE clpr_claims 
+ADD COLUMN IF NOT EXISTS unified_id TEXT;
+
+-- 2. Добавляем contact_id (ID контакта в RetailCRM)
+ALTER TABLE clpr_claims 
+ADD COLUMN IF NOT EXISTS contact_id TEXT;
+
+-- 3. Добавляем phone (номер телефона пользователя)
+ALTER TABLE clpr_claims 
+ADD COLUMN IF NOT EXISTS phone TEXT;
+
+-- 4. Создаём индексы для быстрого поиска
+CREATE INDEX IF NOT EXISTS idx_clpr_claims_unified_id 
+ON clpr_claims(unified_id) 
+WHERE unified_id IS NOT NULL;
+
+CREATE INDEX IF NOT EXISTS idx_clpr_claims_contact_id 
+ON clpr_claims(contact_id) 
+WHERE contact_id IS NOT NULL;
+
+CREATE INDEX IF NOT EXISTS idx_clpr_claims_phone 
+ON clpr_claims(phone) 
+WHERE phone IS NOT NULL;
+
+-- 5. Комментарии к полям
+COMMENT ON COLUMN clpr_claims.unified_id IS 'Уникальный идентификатор пользователя из CRM (формат: usr_xxx)';
+COMMENT ON COLUMN clpr_claims.contact_id IS 'ID контакта в RetailCRM';
+COMMENT ON COLUMN clpr_claims.phone IS 'Номер телефона пользователя (формат: 79262306381)';
+
+-- 6. Опционально: заполняем существующие записи из payload (если есть)
+UPDATE clpr_claims 
+SET 
+  unified_id = payload->>'unified_id',
+  contact_id = payload->>'contact_id',
+  phone = payload->>'phone'
+WHERE unified_id IS NULL 
+  AND (
+    payload->>'unified_id' IS NOT NULL 
+    OR payload->>'contact_id' IS NOT NULL 
+    OR payload->>'phone' IS NOT NULL
+  );
+
+-- Проверка результата
+SELECT 
+  COUNT(*) as total_claims,
+  COUNT(unified_id) as with_unified_id,
+  COUNT(contact_id) as with_contact_id,
+  COUNT(phone) as with_phone
+FROM clpr_claims;
+