Запрос на слияние 'feature/phase-1' (#1) из feature/phase-1 в main

refactor: move business logic into Dog and Room aggregates

refactor: extract Factory and Adapter patterns from services

test: add unit and e2e integration tests (32 tests)

feat: add REST controllers and fix H2 case-sensitive identifiers

refactor: move business logic into Dog and Room aggregates

refactor: extract Factory and Adapter patterns from services

test: add unit and e2e integration tests (32 tests)

feat: add REST controllers and fix H2 case-sensitive identifiers

feat: add repositories, DTOs, services and room selection strategy

feat: implement Dog and Room aggregates with H2 schema

docs: add project description, standards and README

initial commit