docs: create roadmap (4 phases)

Phases:
1. Core Generation Pipeline: 36 requirements (infra + calendar + LLM + CSV + UI)
2. Prompt Control + Output Review: 2 requirements
3. Organization Layer: 5 requirements (swipe file)
4. Enrichment: 3 requirements (Unsplash)

All 46 v1 requirements mapped to phases.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.planning/STATE.md

@@ -0,0 +1,65 @@
+# Project State
+
+## Project Reference
+
+See: .planning/PROJECT.md (updated 2026-03-07)
+
+**Core value:** Generare un calendario di 13 caroselli Instagram strategicamente orchestrati, pronti per Canva Bulk Create, con un click dalla Web UI.
+**Current focus:** Phase 1 — Core Generation Pipeline
+
+## Current Position
+
+Phase: 1 of 4 (Core Generation Pipeline)
+Plan: 0 of 4 in current phase
+Status: Ready to plan
+Last activity: 2026-03-07 — Roadmap e STATE.md inizializzati dopo requirements e research
+
+Progress: [░░░░░░░░░░] 0%
+
+## Performance Metrics
+
+**Velocity:**
+- Total plans completed: 0
+- Average duration: — min
+- Total execution time: 0 hours
+
+**By Phase:**
+
+| Phase | Plans | Total | Avg/Plan |
+|-------|-------|-------|----------|
+| - | - | - | - |
+
+**Recent Trend:**
+- Last 5 plans: —
+- Trend: —
+
+*Updated after each plan completion*
+
+## Accumulated Context
+
+### Decisions
+
+Decisions are logged in PROJECT.md Key Decisions table.
+Recent decisions affecting current work:
+
+- [Setup]: Tutti i 9 critical pitfalls identificati dalla research sono concentrati in Phase 1 — affrontarli subito e' la priorita' assoluta
+- [Setup]: FastAPI root_path SOLO via Uvicorn (--root-path), mai nel costruttore FastAPI() — altrimenti doppio path bug
+- [Setup]: CSV encoding = utf-8-sig (BOM) sempre; CANVA_FIELDS locked come costante prima di qualsiasi codice di generazione
+- [Setup]: Prompt di sistema scritti IN italiano (non inglese + "scrivi in italiano")
+- [Setup]: Per-item error isolation dal primo loop di generazione — un fallimento non blocca il batch
+
+### Pending Todos
+
+None yet.
+
+### Blockers/Concerns
+
+- [Phase 1]: Canva field schema (placeholder names) non ancora definiti — devono essere locked come CANVA_FIELDS prima di scrivere codice generazione o LLM output schema
+- [Phase 1]: Validare token usage reale per batch 13 post con claude-sonnet-4-5 contro limite Tier 1 (8,000 OTPM) — necessario inter-request delay configurabile (2-3s)
+- [Phase 1]: Baseline qualita' prompt italiani da validare dopo prima generazione reale
+
+## Session Continuity
+
+Last session: 2026-03-07
+Stopped at: Roadmap creato, STATE.md inizializzato — pronto per /gsd:plan-phase 1
+Resume file: None