feat(growth): add Organic Outcome Bridge v1

[JorgeMenaDev]

Outcome

Ship Organic Outcome Bridge v1 across posthog-growth-workspace 1.2.0 and seo-growth-workspace 5.1.2.

The PostHog skill now produces a versioned, aggregate, public-canonical-landing-page outcome export. The SEO skill consumes it beside page-dimensional Search Console evidence for SEO, marketing, and sales-quality decisions.

Boundaries

• No Search Console query is joined to a person, distinct ID, session, replay, email, company, or CRM identity.
• PostHog is scoped by explicit closed window, allowed entry host, and computed session.$channel_type = 'Organic Search'.
• Only verified public canonical URLs may leave PostHog; sensitive/dynamic paths are withheld without values.
• Outcome counts use exact same-session deduplication. Later-session lifecycle/multi-touch attribution is deferred.
• Qualified/customer fields remain null unless a verified event carries the original organic session ID.
• Revenue is explicitly unavailable in v1; CRM/billing remains truth.
• GSC page-dimensional rows remain top-row/partial evidence, not guaranteed-complete totals.

Andesphere dogfood

Closed window: 2026-06-12 through 2026-07-09 Pacific Time.

• GSC: 15 raw page-dimensional rows normalized to 14 canonical pages.
• PostHog project 302810: allowed host www.andesphere.com; /es had 2 organic sessions and 0 exact primary-conversion sessions.
• /es GSC evidence: 1 click, 7 impressions, 14.3% CTR, average position 31.0.
• All unmatched GSC pages are preserved with null PostHog outcomes.
• Evidence grade: baseline; no outcome-led SEO backlog change.

Evidence: dev/posthog-growth-workspace/2026-07-13-organic-outcome-bridge-v1.md and its aggregate JSON export.

Verification

• node dev/seo-growth-workspace/validate-skill.mjs — PASS (52 sections)
• node dev/seo-growth-workspace/command-inventory.mjs --verify — PASS (0 malformed; foreign-CWD matrix green)
• node dev/seo-growth-workspace/evaluate-release.mjs --json — PASS (100/100; 52 deterministic + 17 manual gates)
• Live PostHog HogQL: host-scoped session query and exact uniqExactIf outcome query — PASS
• Live GSC --dimensions page export — PASS
• git diff --check — PASS
• Autoreview final run — clean; no accepted/actionable findings

Interaction with PR #120

This ships SEO 5.1.2 so the open machine-readable-companions PR can retain its planned 5.2.0 version after rebasing. The feature surfaces are otherwise separate.