sic 0.2.0: nested targets + v2 argv-boundary wire (dual-read, backward compatible)

Bumps sicd + sic-agent (arch PKGBUILDs, debian build-deb.sh, both changelogs) to
0.2.0-1 against sic tag v0.2.0 (tarball sha fe0569013da5...). New tarball verified
building all four packages locally (debian amd64 debs + arch verifysource) before push.

What 0.2.0 ships (source git.reauktion.de/marfrit/sic @ 4fcd851):
  * Nested targets: sic host/hop1/hop2 cmd peels incus/docker/pct container hops,
    resolved via /etc/sic/hosts.toml, built as a netstring onion.
  * argv boundaries preserved end to end (length-framed [][]byte, never space-split)
    -- the founding guarantee: sic host touch 'a b' stays ONE file.
  * Daemon dual-reads v1 and v2 (first-byte dispatch), so pre-0.2.0 clients keep
    working during the staged rollout.
  * Client forwards stdin AFTER the frame (fixes the v0.1.0 zero-byte trap), ssh -T
    binary-safe, exit status inherited.
  * Hardened + reviewed (bullpen 964/970): outer-length cap before alloc, per-element
    and byte caps, explicit canonical argc (empty "" args representable).

Also removes continue-on-error from the four sic CI jobs (sicd/sic-agent x arch/debian)
so a broken build fails the workflow loudly instead of silently producing nothing --
the reason the sic jobs went unnoticed as never-succeeding since 2026-07-19.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

debian/sic-agent/build-deb.sh

@@ -6,9 +6,9 @@
 # Needs: go, dpkg-deb, curl.
 set -euo pipefail
 
-PKGVER=0.1.0
+PKGVER=0.2.0
 PKGREL=1
-SIC_TARBALL_SHA256=5cd10c3a1ab7361e72e7579af5819f9d322ecd59424541cfb80e5b7514253511
+SIC_TARBALL_SHA256=fe0569013da5bfa248743cd04bc2f09da8217b04432aa69827ed5287a133a37c
 HERE=$(dirname "$(readlink -f "$0")")
 
 DEB_ARCH="${1:-$(dpkg --print-architecture)}"
@@ -18,7 +18,7 @@ case "$DEB_ARCH" in
     *) echo "unsupported arch: $DEB_ARCH (use amd64 or arm64)" >&2; exit 1 ;;
 esac
 
-export SOURCE_DATE_EPOCH=1784462400
+export SOURCE_DATE_EPOCH=1784808000
 
 work=$(mktemp -d)
 trap "rm -rf $work" EXIT

debian/sic-agent/debian/changelog

@@ -1,3 +1,14 @@
+sic-agent (0.2.0-1) unstable; urgency=low
+
+  * Client rewritten onto the v2 wire: nested `host/hop1/hop2` targets resolved
+    via /etc/sic/hosts.toml, boundary-preserved argv ([][]byte, never space-
+    joined; --sh is the sole shell-line exception). Now forwards stdin AFTER the
+    frame — fixes the v0.1.0 trap where `sic host 'cat >f' <local` wrote a
+    zero-byte file and reported success. `ssh -T` (binary-safe frame), exit
+    status inherited. Reviewed (bullpen 964/970).
+
+ -- Markus Fritsche <mfritsche@reauktion.de>  Thu, 23 Jul 2026 12:00:00 +0000
+
 sic-agent (0.1.0-1) unstable; urgency=low
 
   * Initial release: sic client plus foreground/background agent skills.