fix(ja4ebpf): split bpf2go generate into Ja4Tc + Ja4Ssl, fix RPM systemd-rpm-macros

- Use two separate //go:generate directives (Ja4Tc for tc_capture.c, Ja4Ssl
  for uprobe_ssl.c) to avoid duplicate LICENSE symbol and multi-file clang issue
- Update loader.go to hold tcObjs/sslObjs separately with correct field names:
  UprobeSslSetFd, UprobeSslReadEntry, UretprobeSslReadExit,
  KprobeAccept4Entry, KretprobeAccept4Exit
- Add systemd-rpm-macros to all three RPM build stages (el8/el9/el10)
  so that %{_unitdir} macro resolves correctly
- RPMs now build successfully for el8, el9, el10

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

tests/integration/nginx/platform/Dockerfile

@@ -0,0 +1,56 @@
+# =============================================================================
+# Platform nginx — Rocky Linux 9
+# Construit ja4ebpf (eBPF CO-RE) + nginx avec HTTP/2 et TLS.
+#
+# Multi-stage :
+#   ebpf-builder  — compile les programmes eBPF C avec clang
+#   go-builder    — compile ja4ebpf (go generate + go build)
+#   runtime       — nginx + binaire ja4ebpf sur Rocky Linux 9
+# =============================================================================
+
+# ── Stage 1 : build ja4ebpf ──────────────────────────────────────────────────
+FROM golang:1.24-bookworm AS go-builder
+
+RUN apt-get update && apt-get install -y clang llvm libbpf-dev && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /build
+COPY go.work go.work.sum* ./
+COPY shared/go/ja4common/go.mod shared/go/ja4common/go.sum* ./shared/go/ja4common/
+COPY services/ja4ebpf/go.mod services/ja4ebpf/go.sum* ./services/ja4ebpf/
+RUN cd services/ja4ebpf && go mod download 2>/dev/null; true
+
+COPY shared/go/ja4common/ ./shared/go/ja4common/
+COPY services/ja4ebpf/ ./services/ja4ebpf/
+
+WORKDIR /build/services/ja4ebpf
+RUN GOWORK=off go generate ./internal/loader/ && \
+    GOWORK=off CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
+    go build -ldflags="-s -w" -o /out/ja4ebpf ./cmd/ja4ebpf/
+
+# ── Stage 2 : runtime nginx + ja4ebpf ────────────────────────────────────────
+ARG BASE_IMAGE=rockylinux:9
+FROM ${BASE_IMAGE}
+
+RUN dnf install -y epel-release && \
+    dnf install -y nginx openssl curl && \
+    dnf clean all
+
+COPY --from=go-builder /out/ja4ebpf /usr/local/bin/ja4ebpf
+
+# Configuration nginx : HTTP/2 + TLS auto-signé
+RUN openssl req -x509 -nodes -days 365 \
+        -subj "/CN=platform.test" \
+        -newkey rsa:2048 \
+        -keyout /etc/pki/tls/private/nginx.key \
+        -out /etc/pki/tls/certs/nginx.crt && \
+    mkdir -p /var/www/html && \
+    echo '{"status":"ok","stack":"nginx"}' > /var/www/html/health && \
+    mkdir -p /var/log/nginx /run/nginx
+
+COPY tests/integration/nginx/platform/nginx.conf /etc/nginx/nginx.conf
+COPY tests/integration/nginx/platform/ja4ebpf.yml /etc/ja4ebpf/config.yml
+COPY tests/integration/nginx/platform/entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+EXPOSE 80 443
+CMD ["/entrypoint.sh"]