CI - Add path filter to deploy workflow

[MantisClone]

Problem

The deploy workflow triggers on ANY push to main, including PRs that only change GitHub workflow files (.github/workflows/*.yml). This causes unnecessary subgraph deployments that can break the /version/latest alias in The Graph Studio if left unpublished.

Proposed Solution

Add a paths filter to the deploy workflow so it only triggers when actual subgraph code changes:

on:
  push:
    branches: ["main"]
    paths:
      - 'schema.graphql'
      - 'src/**'
      - 'subgraph.*.yaml'
      - 'package.json'
      - 'networks.json'
      - 'abis/**'
  workflow_dispatch:

Considerations

• workflow_dispatch is preserved so manual deployments are still possible
• This would have prevented the Jan 2026 incident where workflow-only PRs (chore: add auto-project workflow #114, chore: add reopen-issue-if-prs-open workflow #115, chore: remove pull_request trigger from auto-project workflow #116) triggered deployments that broke the requestNetwork build