fix: Load summarization model locally with float16 (HF free tier has no outbound DNS)

fix: DNS endpoint discovery - test multiple HF hostnames to find reachable one

fix: Construct RequestParameters with all 6 required args (url, task, model, json, data, headers)

fix: Construct RequestParameters properly using inspect.signature

fix: Try multiple _inner_post calling conventions + inspect signature

fix: Use _inner_post transport from InferenceClient v1.19.0

debug: Deep diagnostics to find InferenceClient internal transport

fix: Back to InferenceClient with correct method signatures + diagnostics

fix: Use requests.post() directly instead of InferenceClient (version compat issue)

fix: Use client.post() for all models, fix summarization params, better error capture

fix: Use huggingface_hub InferenceClient instead of raw urllib (fixes DNS inside HF Spaces)

fix: Add wait_for_model, debug endpoint, and better HF API error handling

feat: Switch all NLP models to HuggingFace Inference API