Fix 6→8 sections in plan detail + ZIP export error

feat: add STW Struttura Organizzativa and Relazioni Istituzionali agents (6 areas per Nardoni spec)

perf: NIM fallback runs outside _gemini_semaphore — parallel across agents

debug: log active provider per agent at init time

feat: add NVIDIA NIM (Gemma 3 27B) as fallback when Gemini rate-limited

Add gemini_direct provider — bypass broken HF models

Add Gemini call rate throttle (7s min between calls)

Serialize Gemini calls and fix 429 retry delay

Add semaphore to cap concurrent Gemini fallback calls at 3

Add Gemini 429 retry with exponential backoff in HF fallback

Fix OnePager vision regex + add Gemini diagnostic logging

Fix: Gemini fallback when HF exhausted; strip pipe-rows in Piano; OnePager vision fallback

fix: executive report roadmap truncation and markdown leaking

Fix HF provider: try together/fireworks-ai per modelli grandi

Switch AI provider to HuggingFace Serverless Inference API

Make model rotation catch all exception types, not just 429/quota

Fix fake data, remove fake URL, add free model rotation chain

Add empty-plan detection and logging to agents parallel executor

feat: structured output format for all agents (Phase 2)

feat: set Gemma 3 27B as primary LLM, Gemini Flash as controlled fallback

Fix 3 root cause bugs blocking all 3 export docs

feat: demo flow + wiki pattern + status fix (HF deploy)

Initial HF Spaces deployment (clean branch without large binaries)