Add divisions management module with database schema and validation

- Introduced `DivisionsModule` to manage organizational divisions, including read and write controllers.
- Created database migrations for the `divisions` table and related constraints.
- Implemented validation for division name and code with corresponding utility functions.
- Added service and repository layers for handling division data operations.
- Developed unit tests for the divisions service, repository, and controllers to ensure functionality and correctness.
- Updated application module to include the new `ConfigurationModule` for better organization.

src/modules/configuration/divisions/division-fields.ts

@@ -0,0 +1,26 @@
+export const DIVISION_NAME_MAX_LENGTH = 64;
+export const DIVISION_CODE_MAX_LENGTH = 16;
+
+/** Letters with single spaces between words. */
+export const DIVISION_NAME_PATTERN = /^[A-Za-z]+(?: [A-Za-z]+)*$/;
+
+/** Alphanumeric and underscore; no spaces. */
+export const DIVISION_CODE_PATTERN = /^[A-Za-z0-9_]+$/;
+
+export function isValidDivisionName(raw: string): boolean {
+  return (
+    typeof raw === 'string' &&
+    raw.length > 0 &&
+    raw.length <= DIVISION_NAME_MAX_LENGTH &&
+    DIVISION_NAME_PATTERN.test(raw)
+  );
+}
+
+export function isValidDivisionCode(raw: string): boolean {
+  return (
+    typeof raw === 'string' &&
+    raw.length > 0 &&
+    raw.length <= DIVISION_CODE_MAX_LENGTH &&
+    DIVISION_CODE_PATTERN.test(raw)
+  );
+}