chore(01-01): add db:seed:class-progression script and gitignore foundry-pf2e

- Add npm script 'db:seed:class-progression' pointing at tsx prisma/seed-class-progression.ts
  (referenced by Wave 2 seed pipeline; placeholder until Wave 2 implements the script)
- Append .gitignore exclusion for server/prisma/data/foundry-pf2e/
  (developer-cloned Foundry pf2e source data, never committed to repo)

.gitignore

@@ -46,3 +46,6 @@ uploads/
 # Misc
 *.tgz
 .cache
+
+# Phase 1 Wave 2 — Foundry pf2e dev clone (cloned manually by dev for seed script)
+server/prisma/data/foundry-pf2e/

server/package.json

@@ -14,6 +14,7 @@
     "db:migrate:status": "prisma migrate status",
     "db:studio": "prisma studio",
     "db:seed": "tsx prisma/seed.ts",
+    "db:seed:class-progression": "tsx prisma/seed-class-progression.ts",
     "db:seed:equipment": "tsx prisma/seed-equipment.ts",
     "db:seed:feats": "tsx prisma/seed-feats.ts",
     "db:update:levels": "tsx prisma/update-equipment-levels.ts",