refactor: remove Debian/DEB packaging, RPM-only support

- Remove all DEB packaging files (packaging/deb/*)
- Update Dockerfile.package to build RPM packages only
- Update build.sh to remove DEB build steps
- Update architecture.yml to reflect RPM-only distribution
- Update README.md installation instructions for RPM only
- Change runtime image from distroless/base-debian12 to scratch
- Clean up obsolete build artifacts in dist/

Supported distributions now:
- CentOS 7 (el7)
- Rocky Linux 8 (el8)
- Rocky Linux 9 (el9)
- Rocky Linux 10 (el10)

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

Dockerfile

@@ -48,7 +48,7 @@ RUN mkdir -p /tmp/runtime-root/var/log/logcorrelator /tmp/runtime-root/var/run/l
 # =============================================================================
 # Runtime stage - minimal image for running the service
 # =============================================================================
-FROM gcr.io/distroless/base-debian12 AS runtime
+FROM scratch AS runtime
 
 # Copy binary from builder
 COPY --from=builder /usr/bin/logcorrelator /usr/bin/logcorrelator
@@ -56,7 +56,7 @@ COPY --from=builder /usr/bin/logcorrelator /usr/bin/logcorrelator
 # Copy example config
 COPY --from=builder /build/config.example.yml /etc/logcorrelator/logcorrelator.yml
 
-# Create necessary directories in builder stage (distroless has no shell)
+# Create necessary directories in builder stage (scratch image has no shell)
 COPY --from=builder /tmp/runtime-root/var /var
 COPY --from=builder /tmp/runtime-root/etc /etc