chore: initial commit — UdyamLinc backend, phases A-E

Spring Boot 4 / Java 17 / Postgres. Masters and serving (A), Agmarknet and
climate ingestion (B), feature store with 14 derivations (C), SpEL rule
engine and risk scoring (D).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/main/java/com/lincfusion/udyamlinc/officer/FieldVisitRepository.java

@@ -0,0 +1,19 @@
+package com.lincfusion.udyamlinc.officer;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface FieldVisitRepository extends JpaRepository<FieldVisit, Long> {
+
+    Optional<FieldVisit> findByVisitId(String visitId);
+
+    List<FieldVisit> findByEnterpriseIdOrderByDueDateAsc(String enterpriseId);
+
+    List<FieldVisit> findByBlockOrderByPriorityAscDueDateAsc(String block);
+
+    List<FieldVisit> findAllByOrderByPriorityAscDueDateAsc();
+
+    long countByStateAndPriority(String state, Integer priority);
+}