feat: add pipeline description with placeholders

[maxy-shpfy]

Description

Added a new PipelineDescription component that enhances pipeline descriptions with dynamic placeholder support. This component allows users to include variables in descriptions that get resolved at runtime, such as ${arguments.InputName} and date formats like ${date.timestamp}.

The component provides both display and editing modes, with a click-to-edit interface when not in read-only mode. It's now used in both the Pipeline Editor and Run Details views.

Pipeline Description

• A dynamic, user-facing name for each pipeline run
• Supports placeholder substitution with runtime values
• Displayed in pipeline run lists, recent executions, and run details

Placeholder Syntax

The pipeline description supports dynamic placeholders that are resolved at submission time:

Placeholder Format	Description	Example
${arguments.<input_name>}	Resolves to the value of a pipeline input argument	${arguments.Dataset Path} → /data/train.csv
${date.timestamp}	Unix timestamp in seconds	1705257600
${date.short}	Localized short date/time	1/14/26, 3:00 PM
${date.long}	Localized long date/time	January 14, 2026 at 3:00:00 PM EST

Example

If a pipeline has:

• Name: Training Pipeline
• Description: Training on ${arguments.Dataset} - ${date.short}

When submitted with argument Dataset = "ImageNet", the run will display:

Training on ImageNet - 1/14/26, 3:00 PM

Type of Change

• New feature
• Improvement

Checklist

• I have tested this does not break current pipelines / runs functionality
• I have tested the changes on staging

Test Instructions

Screen Recording 2026-01-15 at 12.38.37 AM.mov (uploaded via Graphite)

1. Create a pipeline with a description containing placeholders like ${arguments.InputName} or ${date.short}
2. Verify the placeholders are properly resolved in both the editor and run details views
3. Test the click-to-edit functionality in the editor view
4. Confirm read-only mode works correctly in the run details view

[maxy-shpfy]

• feat: canonical name poc #1635
• feat: add pipeline description with placeholders #1634 👈 (View in Graphite)
• master

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