Reinier van der Leer 1fc984f7fd feat(platform/library): Add real-time "Steps" count to agent run view (#9740) ...

- Resolves #9731

### Changes 🏗️

- feat: Add "Steps" showing `node_execution_count` to agent run view
  - Add `GraphExecutionMeta.stats.node_exec_count` attribute

- feat(backend/executor): Send graph execution update after *every* node
execution (instead of only I/O node executions)
  - Update graph execution stats after every node execution

- refactor: Move `GraphExecutionMeta` stats into sub-object
(`cost`, `duration`, `total_run_time` -> `stats.cost`, `stats.duration`,
`stats.node_exec_time`)

### Checklist 📋

#### For code changes:
- [x] I have clearly listed my changes in the PR description
- [x] I have made a test plan
- [x] I have tested my changes according to the test plan:
  - View an agent run with 1+ steps on `/library/agents/[id]`
    - [x] "Info" section layout doesn't break
    - [x] Number of steps is shown
  - Initiate a new agent run
    - [x] "Steps" increments in real time during execution

2025-04-03 18:58:21 +00:00

..

test_con_manager.py

feat(platform/library): Add real-time "Steps" count to agent run view (#9740)

2025-04-03 18:58:21 +00:00

test_ws_api.py

feat(platform/library): Real-time execution updates (#9695)

2025-03-28 12:19:14 +00:00