feat(skill): add "Setting the narrative?" lens for company/product topics

Comparison tables gain a narrative axis judging whether each entity's
community conversation is about what the entity pitches or about
something else (pricing, rivals, an incident). Backed by a new
mandatory Step 0.55 research item that fetches each entity's CURRENT
first-party positioning (RESOLVED_POSITIONING) instead of relying on
memory, and a narrative-check synthesis beat for single-entity company
runs. The mismatch is the signal: companies usually don't control
their own conversation.

tests/test_render_comparison_multi.py

@@ -101,6 +101,8 @@ class RenderComparisonMultiTests(unittest.TestCase):
         self.assertIn("## xAI", rendered)
         # Scaffold table header has a column per entity
         self.assertIn("| Dimension | OpenAI | Anthropic | xAI |", rendered)
+        # The narrative-lens axis is emitted as a scaffold row
+        self.assertIn("| Setting the narrative? |", rendered)
         # Envelope scaffolding present
         self.assertIn("EVIDENCE FOR SYNTHESIS", rendered)
         self.assertIn("END OF last30days CANONICAL OUTPUT", rendered)