Fix lint errors and add ast-grep rule for countAll

- Fix template literal expressions: wrap Date.now() in String()
- Add missing afterAll import in admin.test.ts
- Fix countOwners to use countAll() without misleading <number> type
- Add ast-grep rule to prevent countAll<number>() usage
- Fix formatting issues from merge conflict resolution

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.ast-grep/rules/no-countall-number.yml

@@ -0,0 +1,8 @@
+id: no-countall-number
+language: typescript
+severity: error
+message: "Don't use countAll<number>() - use countAll() instead. PostgreSQL COUNT returns bigint (string), so the type annotation is misleading."
+note: "Use Number() to convert the result if you need a number type."
+rule:
+  pattern: countAll<number>()
+fix: countAll()