test: add 159 tests for all new modules
New test files (171 tests):
- test_routes_shorts.py (16) - short volume, FTD, interest, darkpool
- test_routes_fixed_income.py (34) - treasury, yield curve, SOFR, etc.
- test_routes_economy.py (44) - CPI, GDP, FRED search, Fed holdings
- test_routes_surveys.py (17) - Michigan, SLOOS, NFP, Empire State
- test_routes_regulators.py (20) - COT, SEC litigation, institutions
- test_finnhub_service_social.py (20) - social/reddit sentiment unit tests
- test_routes_sentiment_social.py (20) - social endpoints + composite
Updated:
- test_routes_sentiment.py - match new composite sentiment response shape
Total: 261 tests passing (was 102)
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