feat(db): add incremental upsert seed script for WordNet vocabulary

Implements packages/db/src/seed.ts — reads all JSON files from
scripts/datafiles/, validates filenames against supported language
codes and POS, and upserts synsets into  and
via onConflictDoNothing. Safe to re-run; produces 0 writes on
a duplicate run.

documentation/notes.md

@@ -6,7 +6,7 @@
 - add this to drizzle migrartions file:
 ✅ ALTER TABLE terms ADD CHECK (pos IN ('noun', 'verb', 'adjective', etc));
 
-## open word net
+## openwordnet
 
 download libraries via
 
@@ -45,3 +45,17 @@ list all libraries:
 ```bash
 python -c "import wn; print(wn.lexicons())"
 ```
+
+## drizzle
+
+generate migration file, go to packages/db, then:
+
+```bash
+pnpm drizzle-kit generate
+```
+
+execute migration, go to packages/db (docker containers need to be running):
+
+```bash
+DATABASE_URL=postgresql://username:password@localhost:5432/database pnpm drizzle-kit migrate
+```