release: 0.5.0: Pre-1.0 security review, domain-admin role, doc consolidation

A bounce could be recorded as a successful delivery. The log-tailer's
Fixed:
  - A bounce could be recorded as a successful delivery. The log-tailer's
  - Log-tailer resumes where it stopped instead of jumping to end-of-file on
  - Level-2 rate limit no longer overshoots under concurrency: messages that
Changed:
  - The project has a single public home: `github.com/mixeme/selfpost`. Codeberg
  - Code comments no longer cite the archived specification. References like
  - `docs/code-review.md` is gone. Its plan is finished — phases 0 (bar the
  - `docs/architecture.md` gained a *Code layers* section: a diagram of
  - Phase 1 doc/code hygiene (`docs/code-review.md`): removed ~30 stale
  … (1 more in CHANGELOG)
Security:
  - Pre-release security review (plan § D, model Fable, 2026-08-06): full pass
  - `saslpasswd2` argv: the application login is now passed after a `--`
Added:
  - Optional password encryption for the two secret-bearing downloads (plan
  - Domain import accepts an encrypted export: the envelope is detected by its
  - `selfpost-backup` writes encrypted archives and reads them back:
  - `TestParseDelivery` covers the exotic mail.log shapes the review asked for
  - docs: README *Encrypting a backup or export*; `docs/security.md` §
  … (14 more in CHANGELOG)
Removed:
  - docs: `security.md` — accepted risk «restore old backup revives session rows»
Changed:
  - docs: `implementation-plan.md` trimmed to the sole open v1.x gate — pre-release
  - docs: `architecture.md` — sessions (SQLite, idle renew, password change),
  - docs: `development.md` — expanded e2e stack and `release.yml` matrix workflow.
  - docs: `security.md` — accepted risk for send-log rows stuck at `queued` after
  - docs: `roadmap.md` — optional send-log / `mail.log` follow-ups under v1.x tail.
  … (10 more in CHANGELOG)

Full detail: CHANGELOG.md (0.5.0).

internal/store/domains.go

@@ -16,9 +16,10 @@ var ErrDomainExists = errors.New("domain already exists")
 // ErrDomainNotFound is returned when a domain id/name does not exist.
 var ErrDomainNotFound = errors.New("domain not found")
 
-// Domain is a sending domain managed through the panel (spec 4.1). The DKIM key
-// material itself lives on disk under /data; this row records the selector and
-// metadata. AppCount is populated by the listing queries, not stored.
+// Domain is a sending domain managed through the panel (product.md §
+// Multi-domain model). The DKIM key material itself lives on disk under /data;
+// this row records the selector and metadata. AppCount is populated by the
+// listing queries, not stored.
 type Domain struct {
 	ID           int64
 	Name         string
@@ -28,7 +29,7 @@ type Domain struct {
 }
 
 // AddDomain inserts a new sending domain. The caller is responsible for having
-// validated name (spec 7.6.2) before it reaches SQL; the query is parameterised
+// validated name (security.md) before it reaches SQL; the query is parameterised
 // regardless. A duplicate name maps to ErrDomainExists.
 func (s *Store) AddDomain(name, selector string) (Domain, error) {
 	now := time.Now().UTC()
@@ -49,7 +50,7 @@ func (s *Store) AddDomain(name, selector string) (Domain, error) {
 	return Domain{ID: id, Name: name, DKIMSelector: selector, CreatedAt: now}, nil
 }
 
-// ListDomains returns every domain with its bound-application count (spec 7.2.2),
+// ListDomains returns every domain with its bound-application count (product.md),
 // ordered by name.
 func (s *Store) ListDomains() ([]Domain, error) {
 	rows, err := s.db.Query(`
@@ -92,7 +93,7 @@ func (s *Store) GetDomain(id int64) (Domain, error) {
 }
 
 // DeleteDomain removes a domain. Its applications and their address/binding rows
-// go with it via ON DELETE CASCADE (spec 7.2.4). Returns ErrDomainNotFound if no
+// go with it via ON DELETE CASCADE (product.md). Returns ErrDomainNotFound if no
 // such row existed.
 func (s *Store) DeleteDomain(id int64) error {
 	res, err := s.db.Exec("DELETE FROM domains WHERE id = ?", id)