fix: Postgres-compatible SUM aggregation stock calculation and add product creation endpoint

deploy: complete backend with inventory and orders updates

deploy: add advanced filters, team room edit-delete and deactivation guards

deploy: fix master sales route model references

deploy: update TL customer security access and sync tools

feat: support personal customer scope for manager agent view

feat: upgrade order backend to Naira multi-product, add scoped views

fix: socket.io CORS, add health endpoint

fix: resolve CORS header credentials mismatch for browser clients

deploy: complete backend with Dockerfile

initial commit