test: update all test files with templateId field

- Add templateId: null to all mock BeadIssue objects across test files
- Ensures type compatibility with updated BeadIssue interface

tests/types/beads-types-contract.ts

@@ -24,6 +24,7 @@ const issue: BeadIssue = {
   issue_type: issueType,
   description: 'schema contract',
   assignee: 'agent',
+  templateId: null,
   owner: 'owner@example.com',
   labels: ['test'],
   dependencies: [dependency],