feat(seo): add dated enrichment/SEO/ad-library receipts on /pricing

[JayZeeDesign]

What this does

Adds four dated, catalog-backed receipt examples on /pricing that teach call cost vs usable-result cost, billing unit, misses, and BYOK. All figures sourced verbatim from existing workflow run receipts (no invented numbers).

Four receipt cards:

Receipt	Date	Total	Source workflow
Enrichment: verified lead list	2026-08-26	$3.62 for 50 companies	find-and-verify-a-lead-list
SEO: keyword demand	2026-09-14	$0.11 for 50 keywords	keyword-demand-to-ad-budget
Ad library: Meta + Google	2026-09-14	$0.015 metered (BYOK for Meta)	mine-competitor-meta-ads-as-creative-pack
Creator discovery: Instagram	2026-09-14	$0.20 for 25 creators	discover-creators-in-a-niche

New FAQ items:

• "What is the difference between call cost and usable-result cost?"
• "Are own-key calls billed?"

Both FAQ items are mirrored in the FAQPage JSON-LD (now 7 questions total).

How it was tested

uv run --frozen python -m pytest tests/test_provider_pages.py::test_pricing_page -v
# PASSED

uv run --frozen python -m pytest tests/test_provider_pages.py -v --tb=short
# 9 passed in 12.45s

Verified programmatically:

• All four workflow links present
• All four totals ($3.62, $0.11, $0.015, $0.20) present
• Both dated receipts (2026-08-26, 2026-09-14) present
• New FAQ items present in JSON-LD
• No em-dashes added (existing em-dashes in title/CTAs unchanged)

Checklist

• uv run --frozen python -m pytest tests/test_provider_pages.py passes locally
• No new tests needed (existing test_pricing_page verifies page renders with expected structure)
• No subsystem change (presentation-only addition to existing page)
• No secrets in the diff

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For Jason's review: This is public copy on /pricing. All numbers are copied verbatim from existing workflow receipt pages, not estimated or fabricated.

  

[cursor]

Folded into #551.