count the schema tables instead of printing "?"

The Schema section read ${SCHEMA_TABLES:-?} and nothing ever assigned it, so it
announced "? tables" — which reads as "the count could not be determined" rather
than "nobody set this". schema_table_count existed in lib/build.sh and was never
called.

Counted from schema.ts rather than hardcoded, so the number stays true when a
plugin line is uncommented. Reports 21 against the current tree.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

scripts/setup/officer-setup.sh

@@ -590,6 +590,11 @@ fi
 step "Schema"
 if ! skip; then
   echo ""
+  # Counted from the aggregator rather than hardcoded, so the number is the truth
+  # even when a plugin line is uncommented. It was written as ${SCHEMA_TABLES:-?}
+  # and never assigned, so the section said "? tables" — a placeholder that looked
+  # like the count could not be determined rather than like nobody had set it.
+  SCHEMA_TABLES="$(schema_table_count)"
   info "Database schema"
   echo "     ${SCHEMA_TABLES:-?} tables, applied with 'bun db:push' — drizzle-kit"
   echo "     diffs the schema code against Postgres and alters it directly. There"