Drop closing blanks, honor primary_driver, catalog data-services SKUs

- oci_deck_gen / oci_bizcase_gen: stop appending the Thank You + Oracle
  logo-only closing slides at the end of every generated deck.
- oci_bizcase_gen: Business Drivers now reads primary_driver at the
  drivers-level and at the top level, and renders natural-language values
  verbatim (only snake_case enum tokens are Title-cased). A spec-provided
  drivers.items / additional / secondary list replaces the hardcoded
  "Financial Impact of Inaction" + "Operational Impact" fallback cards.
- oci-sku-catalog.yaml: add data_services category with the four real
  Big Data Service SKUs (B91128/B91129/B91130/B93555) plus EST-DS-NOTEBOOK,
  EST-DS-MODEL, EST-DF-SPARK as estimate placeholders (OCI Data Science /
  Data Flow have no dedicated SKUs in the public pricing API — they are
  billed via the underlying compute shape).
- oci_bom_gen: resolver now prints a stderr warning and tags estimate/
  unknown line items with an explicit note; the xlsx writer renders
  "other" category items under an "Uncategorized — confirm SKUs" section
  at the end instead of silently dropping them.

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

tools/oci_deck_gen.py

@@ -1440,12 +1440,6 @@ class OCIDeckGenerator(OraclePresBase):
                 contact_info=pick(ns, "contact_info"),
             )
 
-        # Closing slides
-        gen.add_closing_slide(
-            name=meta.get("architect", ""),
-            title=meta.get("firm", ""),
-        )
-
         return gen