docs: correct stale product facts (arkivplan, architecture, agents, self-hosting, extensions, database map) (#1931)

Every statement was verified against the code on main before editing; the
docs had drifted from the product in ways a customer or agent would act on.

- public/docs/arkivplan-mall.md: product named erp-base; magic-link login;
  BAS 2025/2026; eu-central/eu-west region; US subprocessors for AI. Now
  Accounted, e-mail + password + TOTP (BankID optional), BAS 2026,
  eu-north-1 Stockholm, Bedrock in EU with Resend as the only US
  subprocessor; adds rättelselogg, Peppol inbound, skattekonto imports and
  the säkerhetsbackup ZIP to the räkenskapsinformation tables.
- ARCHITECTURE.md: adds the inline-rättelse correction path, OAuth 2.1 and
  lazy MCP auth, accounted-mcp and claude-plugin, 150+ tools.
- AGENTS.md: defers to CLAUDE.md instead of a drifted copy; keeps the
  Codex-only constraints with the Supabase project name fixed (erp-base).
- README.md: drops LangChain/OpenAI (not dependencies), Node 20/22 facts,
  150+ tools, adds betalfil, Peppol, skattekonto and the Claude plugin.
- docs/PEPPOL_FOUNDATION.md: the two sentences denying network delivery
  and inbound support now describe the live Qvalia path.
- docs/SELF-HOSTING.md, docs/DOCKER.md: clone URLs and directory names,
  Sentry DSNs are not read by the app, image pinning uses the 7-char SHA
  tags the workflow actually publishes (no semver tag has been cut).
- docs/EXTENSIONS.md: replaces the fictional sector tree with the 19 real
  extensions/general directories; lib/reports/sru-encoding.ts.
- .claude/rules/database.md: 680+ migrations, ~170 live tables, adds the
  tables and RPCs that matter since July, drops sandbox_users.

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

docs/SELF-HOSTING.md

@@ -65,8 +65,8 @@ These are all available on Supabase hosted. `pg_cron` requires a paid plan: if y
 **Option A: Setup script (recommended):**
 
 ```bash
-git clone https://github.com/erp-mafia/gnubok.git
-cd Accounted
+git clone https://github.com/erp-mafia/accounted.git
+cd accounted
 ./setup.sh
 ```
 
@@ -75,8 +75,8 @@ The script checks prerequisites, prompts for your Supabase credentials, auto-gen
 **Option B: Manual:**
 
 ```bash
-git clone https://github.com/erp-mafia/gnubok.git
-cd Accounted
+git clone https://github.com/erp-mafia/accounted.git
+cd accounted
 cp .env.docker.example .env
 ```
 
@@ -313,14 +313,9 @@ VAPID_SUBJECT=mailto:you@example.com
 
 Generate VAPID keys with `npx web-push generate-vapid-keys`. Push notifications require HTTPS.
 
-### Error Tracking (Sentry)
+### Error Tracking
 
-```bash
-SENTRY_DSN=https://...@sentry.io/...
-NEXT_PUBLIC_SENTRY_DSN=https://...@sentry.io/...
-```
-
-Sentry is disabled if these are not set. No errors are thrown.
+There is no Sentry integration. `SENTRY_DSN` and `NEXT_PUBLIC_SENTRY_DSN` are not read by the app: setting them changes nothing. Error-level events go to the container logs (structured JSON on stdout/stderr); `lib/observability/sink.ts` is a provider-agnostic seam that stays a no-op until an adapter is registered with `registerObservabilitySink()`, so a self-hosted build carries no third-party error-tracking dependency. If you want alerting, ship the container logs to your log system and alert there. See [docs/security/logging-and-observability.md](security/logging-and-observability.md).
 
 ## Storage Buckets
 
@@ -341,7 +336,7 @@ If a new release includes database migrations, apply them before restarting:
 supabase db push
 ```
 
-Check the [release notes](https://github.com/erp-mafia/gnubok/releases) for migration instructions.
+Check the [release notes](https://github.com/erp-mafia/accounted/releases) for migration instructions.
 
 ## Architecture Overview