lmcp: 0.5.4 -> 1.0.0-rc1 (full MCP 2025-06-18 surface)

Bumps both arch and debian packaging to track upstream v1.0.0-rc1
(commit deb73d1).

Arch (arch/lmcp/PKGBUILD):
  pkgver=1.0.0_rc1 (Arch convention: '_' substitutes for '-' in pre-
  release tags). _tag back-translates for the source URL.

Debian (debian/lmcp/build-deb.sh + changelog):
  PKGVER=1.0.0~rc1 (Debian convention: '~' sorts before the release).
  UPSTREAM_TAG=v1.0.0-rc1 drives the archive URL.

New tarball sha256: 81f9222264371735c196664382460261ef60a259348766bbd6fd2f49ea9d1e7e

What's in 1.0.0-rc1 (full release notes in upstream commit):
  - 14 issues closed
  - new MCP primitives: Resources, Prompts, Completion, Logging,
    Sampling, Roots, fetch, web_search
  - protocol: cursor pagination, structuredContent, _meta, tool
    annotations, protocolVersion bump to 2025-06-18
  - transports: stdio (LMCP_TRANSPORT=stdio), full Streamable HTTP
    rewrite with sessions, persistent SSE, server-initiated requests
  - json.lua: UTF-16 surrogate pairs + empty_object sentinel
  - backwards-compatible with every existing sessionless-POST client

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

debian/lmcp/build-deb.sh

@@ -7,9 +7,13 @@
 # package (Architecture: all, depends on lua + lua-socket).
 set -euo pipefail
 
-PKGVER=0.5.4
+# Debian-conventional pre-release notation: 1.0.0~rc1 sorts BEFORE 1.0.0.
+# Upstream tag is v1.0.0-rc1 (with dash); UPSTREAM_TAG drives the source URL,
+# PKGVER feeds the Debian package version field.
+PKGVER=1.0.0~rc1
+UPSTREAM_TAG=v1.0.0-rc1
 PKGREL=1
-LMCP_TARBALL_SHA256=af72b8c1d88255456b75d2c53cd5c451a8923417e5498ef31858539397e09caf
+LMCP_TARBALL_SHA256=81f9222264371735c196664382460261ef60a259348766bbd6fd2f49ea9d1e7e
 HERE=$(dirname "$(readlink -f "$0")")
 
 # Reproducible build: pin all file mtimes + ar member timestamps to a fixed
@@ -22,7 +26,7 @@ work=$(mktemp -d)
 trap "rm -rf $work" EXIT
 
 cd "$work"
-curl -sSLfo lmcp.tar.gz "https://git.reauktion.de/marfrit/lmcp/archive/v${PKGVER}.tar.gz"
+curl -sSLfo lmcp.tar.gz "https://git.reauktion.de/marfrit/lmcp/archive/${UPSTREAM_TAG}.tar.gz"
 echo "$LMCP_TARBALL_SHA256  lmcp.tar.gz" | sha256sum -c
 tar xzf lmcp.tar.gz