feat(11-02): add findByStatus method to InitiativeRepository

- Add findByStatus method to InitiativeRepository port interface
- Implement findByStatus in DrizzleInitiativeRepository adapter
- Filter initiatives by status (active/completed/archived)

src/db/repositories/drizzle/initiative.ts

@@ -54,6 +54,13 @@ export class DrizzleInitiativeRepository implements InitiativeRepository {
     return this.db.select().from(initiatives);
   }
 
+  async findByStatus(status: 'active' | 'completed' | 'archived'): Promise<Initiative[]> {
+    return this.db
+      .select()
+      .from(initiatives)
+      .where(eq(initiatives.status, status));
+  }
+
   async update(id: string, data: UpdateInitiativeData): Promise<Initiative> {
     const existing = await this.findById(id);
     if (!existing) {

src/db/repositories/initiative-repository.ts

@@ -44,6 +44,12 @@ export interface InitiativeRepository {
    */
   findAll(): Promise<Initiative[]>;
 
+  /**
+   * Find all initiatives with a specific status.
+   * Returns empty array if none exist.
+   */
+  findByStatus(status: 'active' | 'completed' | 'archived'): Promise<Initiative[]>;
+
   /**
    * Update an initiative.
    * Throws if initiative not found.