feat: display event_time in model details panel

[psaikaushik]

Summary

Display the event_time configuration in the model details panel of the dbt docs UI.

Closes #583
Ref: dbt-labs/dbt-core#12800

Problem

Developers working with microbatch models need to verify that event_time is configured on a model and its parents. Currently, they have to manually check both the YAML config and the code — the docs UI doesn't surface this information even though it's already present in the manifest at node.config.event_time.

Solution

Add an "Event Time" row to the model details panel in table_details.js, following the same pattern as other config-derived properties (Owner, Language, Contract, etc.).

The change:

1. Reads event_time from model.config.event_time
2. Adds it to the getBaseStats() detail list
3. Only displays it when configured (the existing _.filter removes entries with undefined values)

Code change (3 lines added)

// In getBaseStats():
const event_time = model.hasOwnProperty('config') && model.config.event_time
    ? model.config.event_time
    : undefined;

// In the stats array:
{
    name: "Event Time",
    value: event_time
},

How it looks

When event_time is configured on a model, the details panel will show:

Event Time    created_at

When event_time is not configured, the row is hidden (same behavior as Version, Access, etc.).

Checks

• Minimal change — only table_details.js modified
• Follows existing patterns for config-derived details
• No display when event_time is not configured (graceful degradation)
• CLA signed