docs: add path-filtered pull_request trigger examples to create-agentic-workflow.md

[Copilot]

The pull_request trigger supports paths and paths-ignore filtering but had no examples in the workflow creation guide — leaving backend/QA authors without guidance for scoping workflows to specific file changes.

Changes

• New paths: example adjacent to the existing PR automation bullet, using realistic backend patterns (db/migrations/*.sql, schema/**, src/api/**)
• New paths-ignore: example showing the inverse pattern (skip docs-only PRs)
• Decision guidance on when to use paths: vs paths-ignore: vs neither

on:
  pull_request:
    types: [opened, synchronize]
    paths:
      - 'db/migrations/*.sql'
      - 'schema/**'
      - 'src/api/**'

[Copilot]

Pull request overview

Adds missing documentation examples for GitHub Actions pull_request path filtering in the agentic workflow creation guide, helping authors scope PR-triggered workflows to relevant file changes.

Changes:

• Adds a paths: example for PR automation scoped to backend/QA-relevant file patterns
• Adds a paths-ignore: example to skip docs-only PRs
• Adds concise guidance on choosing paths: vs paths-ignore: vs no path filters

Show a summary per file

File	Description
.github/aw/create-agentic-workflow.md	Documents pull_request path filtering with examples and decision guidance for workflow authors

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