fix: bug: agents Dockerfile build fails — SOPS checksum download unreachable (#120)

docker/agents/Dockerfile

@@ -3,20 +3,16 @@ FROM debian:bookworm-slim
 RUN apt-get update && apt-get install -y --no-install-recommends \
     bash curl git jq tmux cron python3 python3-pip openssh-client ca-certificates age shellcheck \
     && pip3 install --break-system-packages networkx \
-    && curl -sL https://github.com/getsops/sops/releases/download/v3.9.4/sops-v3.9.4.linux.amd64 \
-       -o /usr/local/bin/sops \
-    && curl -sL https://github.com/getsops/sops/releases/download/v3.9.4/sops-v3.9.4.checksums.txt \
-       -o /tmp/sops-checksums.txt \
-    && sha256sum -c --ignore-missing /tmp/sops-checksums.txt \
-    && rm -f /tmp/sops-checksums.txt \
-    && chmod +x /usr/local/bin/sops \
     && rm -rf /var/lib/apt/lists/*
 
+# Pre-built binaries (copied from docker/agents/bin/)
+# SOPS — encrypted data decryption tool
+COPY bin/sops /usr/local/bin/sops
+RUN chmod +x /usr/local/bin/sops
+
 # tea CLI — official Gitea/Forgejo CLI for issue/label/comment operations
-# Checksum from https://dl.gitea.com/tea/0.9.2/tea-0.9.2-linux-amd64.sha256
-RUN curl -sL https://dl.gitea.com/tea/0.9.2/tea-0.9.2-linux-amd64 -o /usr/local/bin/tea \
-    && echo "be10cdf9a619e3c0f121df874960ed19b53e62d1c7036cf60313a28b5227d54d  /usr/local/bin/tea" | sha256sum -c - \
-    && chmod +x /usr/local/bin/tea
+COPY bin/tea /usr/local/bin/tea
+RUN chmod +x /usr/local/bin/tea
 
 # Claude CLI is mounted from the host via docker-compose volume.
 # No internet access to cli.anthropic.com required at build time.