feat: ja4-platform monorepo — 5 services unified, tests & RPM builds standardized

Services:
- ja4sentinel: TLS/JA4 fingerprint capture daemon (Go, libpcap)
- logcorrelator: JA4 log correlation engine (Go, ClickHouse)
- mod_reqin_log: Apache module (C, JSON request logging)
- bot_detector: ML bot detection pipeline (Python)
- dashboard: FastAPI/Streamlit analytics UI (Python)

Shared libraries:
- shared/go/ja4common: logger, config, shutdown, ipfilter (Go module)
- shared/python/ja4_common: ClickHouseClient, ClickHouseSettings (Python package)
- shared/clickhouse/: canonical SQL migrations (10 files)

Build & packaging:
- Unified 3-stage Dockerfile.package for Go RPMs (el8/el9/el10)
- go.work workspace linking sentinel, correlator, ja4common
- Makefile with test-all, build-all, rpm-* targets

Fixes applied:
- go.work: 1.21 → 1.24.6 (required by sentinel)
- correlator Dockerfiles: golang:1.21 → golang:1.24
- replace directives in go.mod for ja4common local path
- pyproject.toml: setuptools.backends → setuptools.build_meta
- Removed static libpcap linking (unavailable on Rocky 9)
- Fixed data races in output/writers_test.go (sync.Mutex + atomic.Int32)
- Rewrote corrupted test files (logger_test.go × 2)

Test coverage:
- correlator: 67.1% total (unixsocket 80.5%, config 91.7%, app 83.3%, multi 87.7%, stdout 100%)
- sentinel: all 10 packages pass (api, capture, config, fingerprint, ipfilter, logging, output, tlsparse)

Documentation:
- README.md + docs/ (architecture, development, 5 services, shared libs, DB schema & migrations)

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

services/correlator/Dockerfile

@@ -0,0 +1,43 @@
+# syntax=docker/dockerfile:1
+FROM golang:1.24 AS builder
+
+WORKDIR /build
+
+RUN apt-get update && apt-get install -y --no-install-recommends git bc && rm -rf /var/lib/apt/lists/*
+
+COPY go.work go.work.sum* ./
+COPY shared/go/ja4common/ ./shared/go/ja4common/
+COPY services/sentinel/go.mod services/sentinel/go.sum* ./services/sentinel/
+COPY services/correlator/go.mod services/correlator/go.sum* ./services/correlator/
+
+WORKDIR /build/services/correlator
+RUN --mount=type=cache,target=/go/pkg/mod go mod download
+
+COPY services/correlator/ /build/services/correlator/
+
+ARG SKIP_TESTS=false
+RUN --mount=type=cache,target=/go/pkg/mod \
+    if [ "$SKIP_TESTS" = "false" ]; then \
+        go test -race -coverprofile=coverage.txt -covermode=atomic ./... && \
+        echo "=== Coverage Report ===" && \
+        go tool cover -func=coverage.txt | grep total && \
+        TOTAL=$(go tool cover -func=coverage.txt | grep total | awk '{gsub(/%/, "", $3); print $3}') && \
+        echo "Total coverage: ${TOTAL}%" && \
+        if (( $(echo "$TOTAL < 60" | bc -l) )); then \
+            echo "ERROR: Coverage ${TOTAL}% is below 60% threshold"; \
+            exit 1; \
+        fi && \
+        echo "Coverage check passed!"; \
+    else \
+        echo "Skipping tests (SKIP_TESTS=true)"; \
+    fi
+
+RUN --mount=type=cache,target=/go/pkg/mod \
+    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
+    -ldflags="-w -s" -o /usr/bin/correlator ./cmd/logcorrelator
+
+FROM scratch AS runtime
+COPY --from=builder /usr/bin/correlator /usr/bin/correlator
+COPY --from=builder /build/services/correlator/config.example.yml /etc/correlator/correlator.yml
+ENTRYPOINT ["/usr/bin/correlator"]
+CMD ["-config", "/etc/correlator/correlator.yml"]