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/clickhouse/09_audit_table.sql

@@ -0,0 +1,21 @@
+-- =============================================================================
+-- 09_audit_table.sql — SOC audit log table for dashboard activity tracking
+-- Referenced as mabase_prod.audit_logs in dashboard/backend/routes/audit.py
+-- =============================================================================
+
+CREATE TABLE IF NOT EXISTS mabase_prod.audit_logs
+(
+    `timestamp`    DateTime                   DEFAULT now(),
+    `user_name`    LowCardinality(String)     DEFAULT 'soc_user',
+    `action`       LowCardinality(String),
+    `entity_type`  LowCardinality(String)     DEFAULT '',
+    `entity_id`    String                     DEFAULT '',
+    `entity_count` UInt32                     DEFAULT 0,
+    `details`      String CODEC(ZSTD(3))      DEFAULT '',
+    `client_ip`    String                     DEFAULT ''
+)
+ENGINE = MergeTree
+PARTITION BY toDate(timestamp)
+ORDER BY (timestamp, user_name, action)
+TTL toDate(timestamp) + INTERVAL 90 DAY
+SETTINGS index_granularity = 8192;