feat(api): sign-in, refresh rotation and bootstrap admin (M1)

- users, refresh_tokens and audit_log schema (migration 00002)
- argon2id passwords with rehash on login, password policy, lockout
  with exponential back-off and a per-IP rate limit in Redis
- Ed25519 JWT access tokens with kid-based key rotation; rotating
  refresh tokens with reuse detection (cookie for web, body for Android)
- bootstrap admin on first start; must_change_credentials and
  must_change_password gate every other endpoint
- /auth/login, /auth/refresh, /auth/logout(-all), /me, /me/password,
  /me/bootstrap-credentials, /me/sessions; server-info reports
  bootstrap_required
- role policy from docs/auth-and-roles.md with table tests
- problem+json errors with field errors; ru/en translations of the codes
- install.sh and update.sh generate JWT_PRIVATE_KEY

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

services/api/go.mod

@@ -8,14 +8,18 @@ require (
 	github.com/caarlos0/env/v11 v11.3.1
 	github.com/getkin/kin-openapi v0.127.0
 	github.com/go-chi/chi/v5 v5.2.2
+	github.com/golang-jwt/jwt/v5 v5.2.2
+	github.com/google/uuid v1.6.0
 	github.com/jackc/pgx/v5 v5.7.5
 	github.com/oapi-codegen/runtime v1.1.1
 	github.com/pressly/goose/v3 v3.24.3
 	github.com/redis/go-redis/v9 v9.10.0
 	github.com/stretchr/testify v1.10.0
+	golang.org/x/crypto v0.38.0
 )
 
 require (
+	github.com/apapsch/go-jsonmerge/v2 v2.0.0 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
@@ -37,9 +41,9 @@ require (
 	github.com/speakeasy-api/openapi-overlay v0.9.0 // indirect
 	github.com/vmware-labs/yaml-jsonpath v0.3.2 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/crypto v0.38.0 // indirect
 	golang.org/x/mod v0.17.0 // indirect
 	golang.org/x/sync v0.14.0 // indirect
+	golang.org/x/sys v0.33.0 // indirect
 	golang.org/x/text v0.25.0 // indirect
 	golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect