Rewrite seed_clickhouse.py: 500K rows from 20K IPs with realistic traffic

- 350K browser rows (14K IPs) using real JA4s from browser_ja4.csv
- 100K scanner rows (3K IPs) with vuln/cred/scraper/DDoS sub-categories
- 30K legit bot rows (2K IPs) from real bot_ip.csv CIDRs
- 20K AI bot rows (1K IPs) for GPTBot, ClaudeBot, etc.

Key improvements:
- Load browser_ja4.csv at startup, match JA4 to browser family
- Load bot_ip.csv to generate IPs from real Googlebot/Bingbot CIDRs
- Hard-coded ISP /24 prefixes from real ASNs (Comcast, Orange, DT, etc.)
- Realistic navigation patterns with Referer chains and cookies
- Sec-CH-UA headers for Chromium browsers (modern_browser_score >= 50)
- Batch size increased to 2000, progress reporting every 10K rows
- New CLI args: --rows, --ips, --seed, --data-dir
- Bot JA4s are synthetic hashes guaranteed NOT in browser_ja4.csv

Also updated:
- Dockerfile: COPY *.py (was missing seed_clickhouse.py)
- docker-compose.yml: mount scripts/data as /app/data for CSV access
- run-tests.sh: updated seeder description comments

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

tests/integration/run-tests.sh

@@ -162,15 +162,15 @@ log "============================================"
 # The seeder inserts directly into http_logs_raw, triggering all MVs:
 #   http_logs_raw → mv_http_logs → http_logs → mv_agg_host_ip_ja4_1h → agg_host_ip_ja4_1h
 # This pre-populates:
-#   - 720 human sessions (IPs in residential ASN ranges → asn_label='human')
-#   - 150 scanner/anomaly sessions (IPs in datacenter ASN → ML anomaly candidates)
-#   - 100 known-bot sessions (IPs/JA4 matching bot_ip.csv / bot_ja4.csv)
-#   - 20 brute-force clusters (many POST /login per IP)
+#   - ~350,000 rows from 14,000 browser IPs (ISP ASN ranges → asn_label='isp')
+#   - ~100,000 rows from 3,000 scanner IPs (datacenter ASN → ML anomaly candidates)
+#   -  ~30,000 rows from 2,000 legit bot IPs (from bot_ip.csv CIDRs)
+#   -  ~20,000 rows from 1,000 AI bot IPs (datacenter ranges)
 # After seeding, bot_detector has ≥500 human rows → can train and run.
 log "Running seed_clickhouse.py..."
 if docker compose exec -T traffic-gen python /app/seed_clickhouse.py \
     --host clickhouse --port 8123 --user default --password ""; then
-    pass "ClickHouse seeded (700+ human + 150 scanner + 100 known-bot rows)"
+    pass "ClickHouse seeded (500K rows: 350K browser + 100K scanner + 30K legit-bot + 20K AI-bot)"
 else
     warn "Seeder reported errors (pipeline verification will show impact)"
 fi