docs+data: refresh demo dumps (clean seeded state) + restore/seeder docs

- backups/procurement.dump regenerated from the clean seeded state (was the
  junk test data); README documents both the app seeder and the restore path
- docs/casdoor-auth.md: later-batch changelog (fulfillment split, demo
  seeder, API-driven topics, hub-and-spoke, count modal, FOUND ceiling,
  semantic colors)

README.md

@@ -201,7 +201,7 @@ docker exec -it procurement-postgres psql -U postgres -d procurement
 
 The databases are **not** in git — Docker volumes hold the data. To let
 everyone see the same system state, the repo ships exact database dumps in
-`backups/` (taken 2026-09-02). After a fresh boot:
+`backups/`. After a fresh boot:
 
 ```powershell
 powershell -ExecutionPolicy Bypass -File .\backups\restore.ps1     # Windows
@@ -209,16 +209,26 @@ bash backups/restore.sh                                            # Linux / Git
 ```
 
 This **replaces all data** in the `procurement` and `casdoor` databases with
-the committed state (users + roles, projects, warehouses, quotes with
-receipts, inventory rows, Casdoor org/app/users). To create a fresh dump of
-your own current state:
+the committed state — a clean, realistic demo: 3 projects × 2 warehouses,
+4 suppliers, 12 materials across all 8 categories, and 4 quotes covering
+every lifecycle state (offered / in-transit / partially received /
+completed) with matching stock.
 
-```powershell
-docker compose stop api casdoor
-docker exec procurement-postgres pg_dump -U postgres -d procurement -Fc > backups/procurement.dump   # (Git Bash: use -f inside the container + docker cp)
-docker exec procurement-postgres pg_dump -U postgres -d casdoor -Fc > backups/casdoor.dump
-docker compose start casdoor api
-```
+Two alternative ways to get a clean state:
+
+1. **App seeder** (realistic demo data, keeps the Casdoor org as-is):
+   ```powershell
+   docker exec procurement-api sh -c "cd /srv/backend && python -m tools.seed"
+   ```
+2. **Casdoor seeder** (creates org `inventory` + app + users razaei /
+   mousavi / mohaghegh / tester — run once after a fresh volume):
+   ```powershell
+   python backend/tools/seed_casdoor.py   # from the host, or from the api container
+   ```
+
+To create a fresh dump of your own current state: stop `api` + `casdoor`,
+`docker exec procurement-postgres pg_dump -U postgres -d procurement -Fc`
+(+ the `casdoor` DB) into `backups/`, then start them again.
 
 ## Common operations