IF creating Lead → MUST include PRIMARY associations (578, 580) inline
IF creating Contact → Associate to Company immediately after
IF creating Deal → Only after discovery call scheduled
IF creating Task → Use hs_timestamp for due date (NOT hs_task_due_date)

IF fetching deals → Always include Owner ID + Pipeline ID filters
IF setting dates → Use Unix milliseconds as STRING
IF bulk operation → Use batch endpoints (100 per batch max)
IF 429 response → Wait for Retry-After header, use exponential backoff

IF setting notes_next_activity_date → CANNOT set directly, create task instead
IF setting Lead hs_lead_type → Use "NEW_BUSINESS" or "UPSELL" (NOT Outbound/Inbound)
IF setting Lead hs_lead_label → Use uppercase: "COLD", "WARM", "HOT"
IF counting tasks completed → Use hs_task_completion_date (NOT hs_timestamp)

# CORRECT - associations inline
lead_payload = {
    "properties": {
        "hs_lead_type": "NEW_BUSINESS",
        "hs_lead_label": "COLD",
        "hubspot_owner_id": "699257003"
    },
    "associations": [
        {"to": {"id": contact_id}, "types": [{"associationCategory": "HUBSPOT_DEFINED", "associationTypeId": 578}]},
        {"to": {"id": company_id}, "types": [{"associationCategory": "HUBSPOT_DEFINED", "associationTypeId": 580}]}
    ]
}

import sys, io
sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding='utf-8')

result = subprocess.run(cmd, capture_output=True, encoding='utf-8')  # NOT text=True