Add live research capabilities with innovation detection

Research Tools:
- SearchTool: Multiple backends (Tavily, Serper, Brave, DuckDuckGo)
- WikipediaTool: Wikipedia lookup
- AcademicSearchTool: CrossRef, Semantic Scholar
- ResearchOrchestrator: Comprehensive multi-source research

ResearchAgent:
- NOT just fact-checking - actively discovers NEW information
- Identifies trends beyond training data cutoff
- Generates innovations from cross-referencing sources
- Deep research with subtopics

VerifiedFactChecker:
- Live claim verification against web sources
- Confidence scoring
- Citation needed detection

Dependencies added: tavily, wikipedia, arxiv, duckduckgo-search

pyproject.toml

@@ -30,6 +30,11 @@ dependencies = [
     "tiktoken>=0.7.0",
     "markdown>=3.7",
     "python-dotenv>=1.0.0",
+    # Research dependencies (NEW!)
+    "tavily>=0.3.0",
+    "wikipedia>=1.4.0",
+    "arxiv>=1.4.0",
+    "duckduckgo-search>=7.0.0",
 ]
 
 [project.optional-dependencies]