fix: call list endpoint on every poll cycle to advance pre-change job state

[noppanut15]

Problem

nac-analytics nd prechange would hang indefinitely at:

Waiting for pre-change analysis <job_id>...

The job would never complete unless the user manually opened the pre-change analysis page in the Nexus Dashboard GUI. For example, even after waiting for more than 25 mins, the tool was still stuck at Waiting for pre-change analysis..., but once the GUI page was opened, the tool would resume and finish within ~15 seconds. (the next the poll interval)

Affected ND Version

• 4.2(1)
• 4.3(1)

Root Cause

The polling loop in wait_prechange_analysis() was exclusively calling the single-job GET endpoint:

GET /api/v1/analyze/jobs/prechangeAnalysis/{job_id}

The Nexus Dashboard backend does not advance a job's state in response to this endpoint alone. Advancing job state requires the list endpoint to be called (mimics what GUI does):

GET /api/v1/analyze/jobs/prechangeAnalysis?sort=-analysisSubmissionTime&offset=0&max=10

This was confirmed manually via Postman. The list endpoint is required for both transitions:

Transition of analysisStatus	Requires list endpoint
submitted → running	✅
running → completed	✅

Opening the GUI's pre-change list page fires this exact request on every page load, which is why the CLI would unblock whenever the user navigated to the GUI.

Fix

Added list_prechange_analyses() which calls the list endpoint with the same query parameters the GUI uses. It is called on every poll iteration in wait_prechange_analysis() before the single-job GET. The list response is discarded — the single-job GET is still used for the actual status check, so we avoid iterating potentially many jobs on every cycle.

poll cycle:
  1. GET /api/v1/analyze/jobs/prechangeAnalysis?sort=-analysisSubmissionTime&offset=0&max=10  ← trigger the job status refresh
  2. GET /api/v1/analyze/jobs/prechangeAnalysis/{job_id}  ← read status

Testing

Verified end-to-end against a real Nexus Dashboard instance, both version 4.2(1) and 4.3(1), with plan.json — the job progressed through both transitions and completed successfully without any GUI interaction:

Connecting to <ndi-host> as <user>...
Submitting pre-change analysis...
Waiting for pre-change analysis 6a8f684db88af8fdb902f04c...
Collecting change approval detail...
DECISION: PASS — No new critical/major anomalies (1 new overall).

All 218 unit tests pass. Ruff clean.

Changes

• nac_analytics/products/nexus_dashboard/client.py — added list_prechange_analyses() and called it on every poll cycle in wait_prechange_analysis()
• tests/unit/test_prechange.py — added LIST_PATH / LIST_RESPONSE constants and registered the list route in all polling test labs
• tests/unit/test_cli_commands.py — added PRECHANGE_LIST_PATH and registered the list route in build_lab()

[noppanut15]

FYI: The PR description has been updated with ND 4.3 testing.