refactor: remove obsolete config and update documentation

- Remove config.example.conf (replaced by config.example.yml)
- Update Dockerfile to use YAML config
- Update README.md with YAML configuration examples
- Remove old directive-based config documentation
- Update package paths (DEB and RPM) in README

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

Dockerfile

@@ -54,7 +54,7 @@ FROM gcr.io/distroless/base-debian12 AS runtime
 COPY --from=builder /usr/bin/logcorrelator /usr/bin/logcorrelator
 
 # Copy example config
-COPY --from=builder /build/config.example.conf /etc/logcorrelator/logcorrelator.conf
+COPY --from=builder /build/config.example.yml /etc/logcorrelator/logcorrelator.yml
 
 # Create necessary directories in builder stage (distroless has no shell)
 COPY --from=builder /tmp/runtime-root/var /var
@@ -65,7 +65,7 @@ COPY --from=builder /tmp/runtime-root/etc /etc
 
 # Set entrypoint
 ENTRYPOINT ["/usr/bin/logcorrelator"]
-CMD ["-config", "/etc/logcorrelator/logcorrelator.conf"]
+CMD ["-config", "/etc/logcorrelator/logcorrelator.yml"]
 
 # =============================================================================
 # RPM build stage - create .rpm package entirely in Docker
@@ -84,7 +84,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 COPY --from=builder /usr/bin/logcorrelator /tmp/pkgroot/usr/bin/logcorrelator
 
 # Copy config and systemd unit
-COPY --from=builder /build/config.example.conf /tmp/pkgroot/etc/logcorrelator/logcorrelator.conf
+COPY --from=builder /build/config.example.yml /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml
 COPY logcorrelator.service /tmp/pkgroot/etc/systemd/system/logcorrelator.service
 
 # Create directory structure and set permissions
@@ -106,7 +106,7 @@ RUN fpm -s dir -t rpm \
     --vendor "logcorrelator" \
     -p /tmp/logcorrelator-${VERSION}.rpm \
     usr/bin/logcorrelator \
-    etc/logcorrelator/logcorrelator.conf \
+    etc/logcorrelator/logcorrelator.yml \
     etc/systemd/system/logcorrelator.service \
     var/log/logcorrelator \
     var/run/logcorrelator
@@ -147,4 +147,4 @@ RUN go mod download || true
 COPY . .
 
 # Default command: run with example config
-CMD ["go", "run", "./cmd/logcorrelator", "-config", "config.example.conf"]
+CMD ["go", "run", "./cmd/logcorrelator", "-config", "config.example.yml"]