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).

build/Dockerfile

@@ -13,8 +13,7 @@ WORKDIR /src
 # Version stamped into both binaries; MUST match the image tag (spec 7.5.A).
 ARG VERSION=dev
 
-# Module metadata first for layer caching. go.sum arrived in Phase 2 with the
-# SQLite driver and bcrypt.
+# Module metadata first for layer caching.
 COPY go.mod go.sum ./
 RUN go mod download
 
@@ -24,10 +23,10 @@ COPY internal ./internal
 ENV CGO_ENABLED=0
 RUN go vet ./... \
  && go build -trimpath \
-      -ldflags "-X codeberg.org/mix/selfpost/internal/buildinfo.Version=${VERSION}" \
+      -ldflags "-X github.com/mixeme/selfpost/internal/buildinfo.Version=${VERSION}" \
       -o /out/panel ./cmd/panel \
  && go build -trimpath \
-      -ldflags "-X codeberg.org/mix/selfpost/internal/buildinfo.Version=${VERSION}" \
+      -ldflags "-X github.com/mixeme/selfpost/internal/buildinfo.Version=${VERSION}" \
       -o /out/selfpost-backup ./cmd/selfpost-backup
 
 # ---- runtime stage -----------------------------------------------------------
@@ -36,7 +35,7 @@ FROM debian:bookworm-slim AS runtime
 ENV DEBIAN_FRONTEND=noninteractive
 
 # Preseed Postfix so its install is non-interactive and yields a working
-# main.cf. The real relay configuration is generated by the panel in Phase 5.
+# main.cf. The real relay configuration is generated by the panel.
 RUN echo "postfix postfix/mailname string localhost" | debconf-set-selections \
  && echo "postfix postfix/main_mailer_type string Internet Site" | debconf-set-selections \
  && apt-get update \
@@ -50,6 +49,7 @@ RUN echo "postfix postfix/mailname string localhost" | debconf-set-selections \
       supervisor \
       logrotate \
       ca-certificates \
+      curl \
  && rm -rf /var/lib/apt/lists/*
 
 # Unprivileged user for the panel process (spec 7.6.8).
@@ -104,6 +104,11 @@ RUN chmod +x /usr/local/bin/postfix-wrapper.sh /usr/local/bin/postfix-config.sh
 # which needs no inbound listener or EXPOSE.
 EXPOSE 8080 465 587
 
+# Liveness probe: panel HTTP plus mail-path processes (opendkim, panel, postfix).
+# Does not verify TLS, DNS, or end-to-end delivery — see README Operations.
+HEALTHCHECK --interval=30s --timeout=5s --start-period=90s --retries=3 \
+  CMD curl -fsS http://127.0.0.1:8080/healthz || exit 1
+
 # The entrypoint fixes /data ownership (bind mount) as root, then execs
 # supervisord, which becomes PID 1 and owns process supervision (spec 4).
 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]