feat(examples): handle @adcp/sdk@7.10.x storyboard scenarios (closes #782) (#788)

Bump ADCP_SDK_VERSION from 7.9.0 to 7.10.2 in CI workflow.

The original failures reported in #782 were observed against 7.10.1, which
shipped a packaging regression (v1-canonical-mapping.json under the wrong
path). 7.10.2 fixes that lookup path. The two scenarios called out in the
issue (measurement_terms_rejected, invalid_transitions/update_unknown_package)
both pass against examples/seller_agent.py on 7.10.2 with no example-side
changes:

- measurement_terms_rejected: get_products returns premium-homepage from the
  static catalog, $context.product_id resolves cleanly, and the existing
  TERMS_REJECTED guard (variance<5 or window not in c3/c7) fires before the
  PRODUCT_NOT_FOUND fall-through. The seller's error-code precedence is
  already correct.

- invalid_transitions/update_unknown_package: the scenario uses a real
  $context.media_buy_id from a preceding create_media_buy, so the seller's
  existing media_buy-then-package precedence ordering returns PACKAGE_NOT_FOUND
  correctly.

Verified locally: examples/seller_agent.py passes 57/57 graded steps against
@adcp/sdk@7.10.2 (2 list_creatives skips unchanged).

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: bokelley

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ on:
 # Pinned @adcp/sdk version. Bump deliberately; cache invalidates when this moves.
 # Background: adcontextprotocol/adcp-client-python#779 (Track B), adcontextprotocol/adcp#4907.
 env:
-  ADCP_SDK_VERSION: "7.9.0"
+  ADCP_SDK_VERSION: "7.10.2"
 
 concurrency:
   group: ci-${{ github.ref }}