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/dashboard/backend/tests/test_reputation.py

@@ -0,0 +1,25 @@
+import pytest
+
+PRIVATE_RANGES = [
+    "127.0.0.1", "10.0.0.1", "192.168.1.1", "172.16.0.1",
+    "169.254.0.1", "::1", "fc00::1"
+]
+
+
+def is_private_ip(ip: str) -> bool:
+    import ipaddress
+    try:
+        addr = ipaddress.ip_address(ip)
+        return addr.is_private or addr.is_loopback or addr.is_link_local
+    except ValueError:
+        return True
+
+
+def test_private_ips_rejected():
+    for ip in PRIVATE_RANGES:
+        assert is_private_ip(ip), f"{ip} should be private"
+
+
+def test_public_ip_accepted():
+    assert not is_private_ip("8.8.8.8")
+    assert not is_private_ip("1.1.1.1")