Add SpiceDB to devcontainer for test execution

SpiceDB is required for running database tests in components/server.
The test suite expects spicedb binary to be available in PATH.

This change adds SpiceDB installation to the devcontainer Dockerfile,
building it from source to ensure compatibility with the test environment.

Co-authored-by: Ona <no-reply@ona.com>

Author: csweichel

.devcontainer/Dockerfile

@@ -211,6 +211,14 @@ RUN curl -fsSL https://uploader.codecov.io/latest/codecov-linux -o /usr/local/bi
 RUN cd /usr/bin && curl -fsSL https://github.com/cli/cli/releases/download/v2.35.0/gh_2.35.0_linux_${TARGETARCH}.tar.gz \
     | tar xzv --strip-components=2 gh_2.35.0_linux_${TARGETARCH}/bin/gh
 
+# Install SpiceDB
+RUN cd /tmp && \
+    git clone --depth 1 https://github.com/authzed/spicedb.git && \
+    cd spicedb && \
+    go build -o /usr/local/bin/spicedb ./cmd/spicedb && \
+    cd / && \
+    rm -rf /tmp/spicedb
+
 # Install observability-related binaries
 ARG PROM_VERSION="2.36.0"
 RUN curl -LO https://github.com/prometheus/prometheus/releases/download/v${PROM_VERSION}/prometheus-${PROM_VERSION}.linux-${TARGETARCH}.tar.gz && \