revert: restore pre-upstream-merge baseline (tree of 3b673150b)

Roll the tree back to the pre-merge tip 3b673150b, undoing the upstream sync merge 72f4f186d (303 files) and the 13 post-merge commits layered on top of it.

Purpose: restore the last pre-sync baseline so the reported OMEMO/OTR encryption regressions can be reproduced against a known-good state and the upstream sync ruled in or out as the cause. Nothing is dropped from history; the merge and every post-merge commit remain reachable and can be cherry-picked back selectively.

Baseline:     3b673150b chore(chatlog): disable background message file logging (stage 1)

Undoes merge: 72f4f186d merge: sync upstream profanity-im/profanity

Dockerfile.arch

@@ -0,0 +1,78 @@
+FROM archlinux:latest
+
+ENV TERM=xterm
+ENV CC="ccache gcc"
+
+RUN pacman -Syyu --noconfirm
+
+# reflector is optional - if it fails due to network issues, continue with default mirrorlist
+RUN pacman -S --needed --noconfirm reflector && \
+    (reflector --latest 20 --protocol https --sort rate --save /etc/pacman.d/mirrorlist || true)
+RUN pacman-key --init
+RUN pacman -S --needed --noconfirm \
+  autoconf \
+  autoconf-archive \
+  automake \
+  base-devel \
+  ca-certificates \
+  ccache \
+  check \
+  cmake \
+  cmocka \
+  lcov \
+  curl \
+  debuginfod \
+  doxygen \
+  expat \
+  gcc \
+  git \
+  gpgme \
+  gtk3 \
+  libgcrypt \
+  libmicrohttpd \
+  libnotify \
+  libsignal-protocol-c \
+  libotr \
+  libtool \
+  libxss \
+  make \
+  openssl \
+  pkg-config \
+  python \
+  wget \
+  sqlite \
+  valgrind \
+  gdk-pixbuf2 \
+  qrencode
+
+RUN mkdir -p /usr/src/{stabber,profanity}
+
+RUN useradd -mb /usr/src --shell=/bin/false aur && usermod -L aur
+USER aur
+
+WORKDIR /usr/src/aur
+
+# NOTE: These will change their extension to .tar.zst if a new snapshot is built
+# due to:
+# https://www.archlinux.org/news/now-using-zstandard-instead-of-xz-for-package-compression/
+RUN wget https://aur.archlinux.org/cgit/aur.git/snapshot/libstrophe-git.tar.gz
+
+RUN tar -zxvf libstrophe-git.tar.gz
+
+RUN pushd libstrophe-git && makepkg && popd
+
+USER root
+
+RUN pacman -U --noconfirm libstrophe-git/libstrophe-git-*.pkg.tar.zst
+
+WORKDIR /usr/src
+RUN git clone --depth 1 https://git.jabber.space/devs/stabber
+
+WORKDIR /usr/src/stabber
+RUN ./bootstrap.sh
+RUN ./configure --prefix=/usr --disable-dependency-tracking
+RUN make -j$(nproc)
+RUN make install
+
+WORKDIR /usr/src/profanity
+COPY . /usr/src/profanity