Add 12-month growth plan, baseline, weekly log and measurement loop

Week-by-week plan grounded in current GSC data (4,745 impressions, 9 clicks,
CTR 0.19%, hosting cluster at position 27.5, 1,090 impressions on page-1
zero-click queries). One bounded change per week, measured the following week.
Snapshot script: ~/.hermes/scripts/growth_week.py.

growth/metrics.jsonl

@@ -0,0 +1 @@
+{"ts": "2026-10-24T19:00:18+00:00", "clicks": 9, "impressions": 4745, "ctr": 0.18967334035827188, "position": 24.75, "queries": 447, "page1_zero_queries": 17, "page1_zero_impressions": 1090, "money_impressions": 538, "money_position": 27.5, "visitors": 2, "pageviews": 3, "goals": {"Visit /": 1}}