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>

shared/python/ja4_common/tests/test_settings.py

@@ -0,0 +1,64 @@
+import os
+import pytest
+from ja4_common.settings import ClickHouseSettings
+
+
+def test_default_settings():
+    s = ClickHouseSettings()
+    assert s.CLICKHOUSE_HOST == "clickhouse"
+    assert s.CLICKHOUSE_PORT == 8123
+    assert s.CLICKHOUSE_DB == "mabase_prod"
+    assert s.CLICKHOUSE_USER == "admin"
+    assert s.CLICKHOUSE_PASSWORD == ""
+
+
+def test_settings_from_env(monkeypatch):
+    monkeypatch.setenv("CLICKHOUSE_HOST", "myhost")
+    monkeypatch.setenv("CLICKHOUSE_PORT", "9000")
+    monkeypatch.setenv("CLICKHOUSE_DB", "testdb")
+    s = ClickHouseSettings()
+    assert s.CLICKHOUSE_HOST == "myhost"
+    assert s.CLICKHOUSE_PORT == 9000
+    assert s.CLICKHOUSE_DB == "testdb"
+
+
+def test_settings_password_default_empty():
+    s = ClickHouseSettings()
+    assert s.CLICKHOUSE_PASSWORD == ""
+
+
+def test_settings_user_default():
+    s = ClickHouseSettings()
+    assert s.CLICKHOUSE_USER == "admin"
+
+
+def test_settings_password_from_env(monkeypatch):
+    monkeypatch.setenv("CLICKHOUSE_PASSWORD", "secret")
+    s = ClickHouseSettings()
+    assert s.CLICKHOUSE_PASSWORD == "secret"
+
+
+def test_settings_port_is_int():
+    s = ClickHouseSettings()
+    assert isinstance(s.CLICKHOUSE_PORT, int)
+
+
+def test_settings_port_from_env_string(monkeypatch):
+    """Port provided as string env var is coerced to int."""
+    monkeypatch.setenv("CLICKHOUSE_PORT", "9100")
+    s = ClickHouseSettings()
+    assert s.CLICKHOUSE_PORT == 9100
+
+
+def test_settings_all_fields_overridable(monkeypatch):
+    monkeypatch.setenv("CLICKHOUSE_HOST", "h1")
+    monkeypatch.setenv("CLICKHOUSE_PORT", "1234")
+    monkeypatch.setenv("CLICKHOUSE_DB", "mydb")
+    monkeypatch.setenv("CLICKHOUSE_USER", "myuser")
+    monkeypatch.setenv("CLICKHOUSE_PASSWORD", "mypass")
+    s = ClickHouseSettings()
+    assert s.CLICKHOUSE_HOST == "h1"
+    assert s.CLICKHOUSE_PORT == 1234
+    assert s.CLICKHOUSE_DB == "mydb"
+    assert s.CLICKHOUSE_USER == "myuser"
+    assert s.CLICKHOUSE_PASSWORD == "mypass"