docs: update all documentation for Sprint 1 completion

- Update README.md with badges, project status, and improved structure
- Update CHANGELOG.md with Project Review Sprint 1 and version 0.1.1
- Update PRD status to reflect Sprint 1 completion
- Update ingestion script spec status to Completed with review link
- Update Sprint 1 verification report with Project Review reference
- Add comprehensive Sprint 1 Project Review document

Refs: Project Review conducted by agent staff (Product Manager, Tech Lead, Security Auditor)

docs/prd.md

@@ -1,6 +1,17 @@
 # Product Requirements Document (PRD) - MVP
 ## Progetto: LogWhisperer AI (aka Sacchi's Server Sentinel)
-**Status:** MVP (Lancio in 4 giorni - Focus su "Fail fast, fail cheap")
+
+**Status:** 🟢 MVP Active Development - Sprint 1 Completed  
+**Last Updated:** 2026-04-02  
+**Version:** 0.1.0
+
+---
+
+**Sprint Progress:**
+- ✅ Sprint 1: Log Ingestion Script (Completed)
+- 🔄 Sprint 2: AI Processing Pipeline (Planning)
+- ⏳ Sprint 3: Alerting & Onboarding
+- ⏳ Sprint 4: Landing Page & Payments
 
 ### 1. Executive Summary & UVP
 **Vision:** Trasformare log di server e database incomprensibili in alert azionabili e in "plain language" per non-addetti ai lavori.