fix(test): align stage names with consolidated pipeline enum

Followup to 886119c (refactor(sales): consolidate pipeline stages) — the
runtime enum was renamed but a few test fixtures and PDF report templates
still referenced the legacy names, leaving them broken at the type level
(36 tsc errors before this fix).

Renames in this commit:
  visited        -> in_communication (alerts test) / removed (PDF reports)
  signed_eoi_nda -> eoi_signed
  contract       -> contract_signed (interests test) / contract_sent (factory)

Affected files: pipeline-report, revenue-report, makeCreateInterestInput
factory, alerts-engine, pipeline-transitions, interest-scoring.

Verification: tsc clean, 858/858 vitest passing.

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

tests/unit/interest-scoring.test.ts

@@ -142,7 +142,7 @@ describe('calculateInterestScore', () => {
       portId: 'p1',
       clientId: 'c1',
       createdAt: daysAgo(10),
-      pipelineStage: 'contract',
+      pipelineStage: 'contract_signed',
       eoiStatus: 'signed',
       contractStatus: 'signed',
       depositStatus: 'received',