refactor(api-server): move work-graph SQL into db domain methods

Replace six inline queryAll calls in routes-work-graph.ts with domain
methods. db.entityCrud gains listGoals, getGoalForUpdate, listProjects,
getProjectForUpdate. db.knowledge gains listSprints. db.company gains
getDashboardSnapshot, which returns the raw agent/task/activity rows
the dashboard handler aggregates. The route-level row shapes are
preserved in the new GoalListRow / ProjectListRow / SprintListRow
types so HTTP responses remain identical.

src/main/database-base.ts

@@ -190,6 +190,7 @@ export class AppDatabaseBase {
   getInbox(companyId: string) { return this.company.getInbox(companyId); }
   getCompanyMetrics(companyId: string, days: number = 30) { return this.company.getCompanyMetrics(companyId, days); }
   getStandupReport(companyId: string) { return this.company.getStandupReport(companyId); }
+  getDashboardSnapshot(companyId: string) { return this.company.getDashboardSnapshot(companyId); }
 
   // ─── Connectors ────────────────────────────────────────────────────────────