Reorganize documentation and unify the AI assistant rules

Documentation:
- Add docs/README.md, the documentation index that AGENTS.md pointed to as the
  first file to read but which did not exist.
- One home per piece of information: the feature list stays in ROADMAP.md,
  CHANGELOG.md records only when something shipped, TODO.md only ongoing work.
  Reconcile the entries that had drifted (CSI was both done and pending;
  pagelle, badge social and serie were missing from the roadmap).
- Rewrite DATABASE.md as tables: add giocatori_squadra (already created by a
  migration) and profili_giocatore (planned in DD-016), fix the wrong heading
  levels, drop the duplicated roadmap.
- DESIGN_DECISIONS.md: move the index to the top and sort it, extract the
  template into _template-dd.md.
- ARCHITECTURE.md becomes the technical reference; CLAUDE.md no longer
  duplicates it.
- Add docs/EFFICIENZA_CLOUD.md with the rules previously kept in mem/,
  separating what the code enforces from the goals not yet implemented.
- Fix statements the code contradicted: mutations use setQueryData rather than
  invalidateQueries, and scout_sessioni and giocatori_squadra are not read by
  the code yet.
- Track the v1.0 modules with no spec in docs/modules/ from TODO.md.

AI assistants:
- AGENTS.md is the single source of the rules, now including the technical
  constraints only Claude Code knew about (generated files, Vite plugins, data
  access) and an end-of-work checklist that applies to every assistant.
- CLAUDE.md and .cursor/rules/crapp.mdc point to AGENTS.md instead of
  restating it.
- Remove the five .cursor/*.md files, which Cursor never loaded.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

docs/TODO.md

@@ -1,30 +1,35 @@
 # TODO
 
+Solo il lavoro in corso o imminente. L'elenco completo delle funzionalità previste sta in
+[ROADMAP.md](ROADMAP.md); le idee non ancora valutate pure.
+
 ## In corso
 
 - Documentazione tecnica del progetto.
 
----
-
 ## Prossimo
 
-- Certificati medici.
-- Gestione tesseramenti CSI.
+- Certificati medici (roadmap v1.1).
+- Gestione tesseramenti CSI (roadmap v1.1).
 
----
+## Debito di documentazione
+
+Moduli v1.0 in produzione senza scheda in [modules/](modules/) — DD-002 ne prevede la
+retro-documentazione: Presenze, Scout Live, Badge, Pagelle, MVP, Palloni, Obiettivi di
+squadra, Notifiche, Serie di presenze, Infortuni (`src/lib/infortuni.ts`, usato ma non
+documentato in nessun punto).
+
+Non documentate nemmeno le route API pubbliche in `src/routes/api/public/` (`csi`,
+`promemoria-palloni`, `push-config`, `push-messaggio`, `push-subscribe`,
+`sollecita-presenze`).
+
+## Manutenzione ricorrente
+
+- Collegamento CSI: aggiornare `project_id` e `team_id` a inizio stagione 2026/27
+  (vedi [modules/collegamento-csi.md](modules/collegamento-csi.md)).
 
 ## Backlog
 
-- AI Allenamenti.
-- Dashboard amministratore.
-- Collegamento CSI: aggiornare `project_id` e `team_id` per la stagione 2026/27
-  (base implementata, vedi `docs/modules/collegamento-csi.md`).
-
----
-
-## Idee
-
-- Gestione quote.
-- Widget meteo.
-- Analisi Scout con AI.
-- Backup automatici.
+- AI Allenamenti (roadmap v1.2).
+- Dashboard amministratore (roadmap v1.1).
+- Backup automatici (roadmap, idee future).