feat(linkedin-studio): honest newsletter distribution + profile-SEO + outreach pipeline

Step 17 (Wave 4 S4) of the audit remediation. Applies research/03 §D5 + the
two S2 residual fixes folded in. No new commands/agents (counts stay 27/19).

Newsletter (commands/newsletter.md): new "Distribution channel" section after
Step 10 teaching the HONEST native-newsletter mechanics — bypasses organic feed
ranking via ONE deduplicated notification per subscriber per edition (NOT a
three-touchpoint blast); the mass invite fires once → ~1-2K follower floor
(wait until you can spend it); realistic cold-start 0-100 subs months 1-3;
discloses non-export / no-canonical / no-read-analytics / per-subscriber decay;
explicit below-vs-above-floor decision rule. Sourced to research/03 D5.

Profile (commands/profile.md): new "Profile SEO" section — headline as the
highest-weight search field + a per-section keyword-target table
(headline/about/experience/skills/featured), consistency-over-stuffing rule.

Outreach (commands/outreach.md): Step 8c persists the pipeline board to tracked
state via the new recordOutreachContact mutation (mirrors Step 16's
recordFirstHourPlan): additive last_outreach_date/outreach_active scalars + a
non-R-initial ## Outreach Pipeline section in state-updater.mjs +
config/state-file.template.md + --record-outreach CLI branch. +7 tests
(state-updater 26→33, full hook suite 83→90).

Residual 1 (growth-playbook:216): 9:16 "distribution boost" → 4:5/1:1 guidance
(9:16 mobile-only opt-in; "immersive distribution" = uncorroborated heuristic).
Residual 2 (video-strategy-guide:300): "3-second test determines 70% retention"
→ "front-load value for muted autoplay" (three-second hook is folklore, not a
LinkedIn signal).

Verify: grep checks 1-5 pass; test-runner.sh exit 0 (stat-consistency green);
state-updater 33/33. [skip-docs] — tre-doc + version bump deferred to Step 21.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

plugins/linkedin-studio/config/state-file.template.md

@@ -36,6 +36,10 @@ content_series_active: ""
 last_firsthour_date: null         # "YYYY-MM-DD HH:MM" of the most recent first-hour plan
 firsthour_active: false           # true while a first-hour loop is in progress
 
+# Outreach (collab + speaking pipeline)
+last_outreach_date: null          # "YYYY-MM-DD HH:MM" of the most recent outreach contact
+outreach_active: false            # true while an outreach pipeline is being worked
+
 # Profile
 expertise_areas:
   - "general"
@@ -68,3 +72,8 @@ expertise_areas:
 
 <!-- First-hour / reply-loop plans, newest first. Written by /linkedin:firsthour. -->
 <!-- Format: ### [YYYY-MM-DD HH:MM] topic -->
+
+## Outreach Pipeline
+
+<!-- Outreach contacts / pipeline rows, newest first. Written by /linkedin:outreach. -->
+<!-- Format: ### [YYYY-MM-DD HH:MM] partner — track -->