fix: resolve settings/usage chart crash and add ClickHouse usage event seeds (#19039)

## Summary

- **Fix settings/usage page crash**: The `GraphWidgetLineChart`
component used on `settings/usage` was crashing with "Instance id is not
provided and cannot be found in context" because it requires
`WidgetComponentInstanceContext` (for tooltip/crosshair component
states) which is only provided inside the widget system. Wraps the
standalone chart usages with the required context provider.
- **Avoid mounting `GraphWidgetLegend` when hidden**: The legend
component calls `useIsPageLayoutInEditMode()` which requires
`PageLayoutEditModeProviderContext` — another context only available
inside the widget system. Since the settings page passes
`showLegend={false}`, the fix conditionally unmounts the legend instead
of always mounting it with a `show` prop. Applied consistently across
all four chart types (line, bar, pie, gauge).
- **Add ClickHouse usage event seeds**: Generates ~400 realistic
`usageEvent` rows spanning the past 35 days with weighted user activity,
weekday/weekend patterns, and gradual ramp-up. Enables developers to see
the usage analytics page with data locally.

## Test plan

- [ ] Navigate to `settings/usage` — page should render without errors
- [ ] Verify the daily usage line chart displays correctly
- [ ] Navigate to a user detail page from the usage list
- [ ] Verify the user detail chart renders without errors
- [ ] Run `npx nx clickhouse:seed twenty-server` and confirm usage
events are seeded
- [ ] Verify chart legend still works correctly on dashboard widgets (no
regression)


Made with [Cursor](https://cursor.com)

packages/twenty-server/src/modules/workflow/workflow-executor/workflow-actions/ai-agent/ai-agent.workflow-action.ts

@@ -9,6 +9,7 @@ import { type WorkflowAction } from 'src/modules/workflow/workflow-executor/inte
 import { AgentAsyncExecutorService } from 'src/engine/metadata-modules/ai/ai-agent-execution/services/agent-async-executor.service';
 import { AgentEntity } from 'src/engine/metadata-modules/ai/ai-agent/entities/agent.entity';
 import { AiBillingService } from 'src/engine/metadata-modules/ai/ai-billing/services/ai-billing.service';
+import { UsageOperationType } from 'src/engine/core-modules/usage/enums/usage-operation-type.enum';
 import { AUTO_SELECT_SMART_MODEL_ID } from 'twenty-shared/constants';
 import {
   WorkflowStepExecutorException,
@@ -93,6 +94,7 @@ export class AiAgentWorkflowAction implements WorkflowAction {
       agent?.modelId ?? AUTO_SELECT_SMART_MODEL_ID,
       { usage, cacheCreationTokens },
       workspaceId,
+      UsageOperationType.AI_WORKFLOW_TOKEN,
       agent?.id || null,
       userWorkspaceId,
     );