docs: change practice 15

readme

chore: add compose skeleton and usage notes

chore: add local run helper script

test: add k6 smoke and rate-limit scripts

docs: add practice 15 report and diagrams

openapi

service_orders/tests

orders service started

sqlite db init

jwt auth middle

requestId middleware

add logger

add config

service_orders add dockerfile

service_users/tests

service_users/src

service_users/routes