fix(linkedin-studio): S21 harden monetize — drop orphan WebFetch+Write grants, re-source fabricated DM-conversion decay curve to SSOT

- allowed-tools: drop WebFetch (:13) + Write (:15) — orphan grants, zero body
  use; command fetches no URL and persists no file (now Read/Glob/Grep/AskUserQuestion)
- :343-346: replace postulated same-day/next-day/3+day decay curve (incl. invented
  <10% floor) with SSOT-supported qualitative claim + cite references/opportunity-generation.md
- gate 81/0/0 exit 0; counts 29/19 unchanged (.md-only)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016qgzo6rxthw7KuxHjn5vyE

commands/monetize.md

@@ -10,9 +10,7 @@ allowed-tools:
   - Read
   - Glob
   - Grep
-  - WebFetch
   - AskUserQuestion
-  - Write
 ---
 
 # LinkedIn Monetization Strategy
@@ -340,10 +338,9 @@ DM Conversion Framework:
    - Paid: "Want to grab 15 min to see if [offer] is a fit? [booking link]"
    - Not ready: "No rush — follow along and reach out when timing is right"
 
-Response time matters:
-- Same day: roughly half convert to the next step
-- Next day: 20-30% conversion
-- 3+ days: <10% conversion
+Response time matters — speed compounds conversion:
+- Same-day responses convert far better than days-later ones; the longer the gap, the colder the lead.
+- For per-channel benchmarks (speaking / consulting / podcast) and the response window each warrants, see `references/opportunity-generation.md`.
 ```
 
 ## Step 5: CTA Optimization