Add support for FiscalData.treasury.gov

docs/scientific-skills.md

@@ -14,6 +14,7 @@
 - **Ensembl** - Genome browser and bioinformatics database providing genomic annotations, sequences, variants, and comparative genomics data for 250+ vertebrate species (Release 115, 2025) with comprehensive REST API for gene lookups, sequence retrieval, variant effect prediction (VEP), ortholog finding, assembly mapping (GRCh37/GRCh38), and region analysis
 - **FDA Databases** - Comprehensive access to all FDA (Food and Drug Administration) regulatory databases through openFDA API covering drugs (adverse events, labeling, NDC, recalls, approvals, shortages), medical devices (adverse events, 510k clearances, PMA, UDI, classifications), foods (recalls, adverse events, allergen tracking), animal/veterinary medicines (species-specific adverse events), and substances (UNII/CAS lookup, chemical structures, molecular data) for drug safety research, pharmacovigilance, regulatory compliance, and scientific analysis
 - **FRED Economic Data** - Query FRED (Federal Reserve Economic Data) API for 800,000+ economic time series from 100+ sources including GDP, unemployment, inflation, interest rates, exchange rates, housing, and regional data. Supports macroeconomic analysis, financial research, policy studies, economic forecasting, and academic research. Features data transformations (percent change, log), frequency aggregation, vintage/ALFRED historical data access, release calendars, GeoFRED regional mapping, and comprehensive search/discovery by tags and categories
+- **U.S. Treasury Fiscal Data (usfiscaldata)** - Free, open REST API from the U.S. Department of the Treasury providing 54 datasets and 182 data tables covering federal fiscal data. No API key required. Access national debt (Debt to the Penny back to 1993, Historical Debt back to 1790), Daily Treasury Statements (TGA balances, deposits/withdrawals), Monthly Treasury Statements (federal budget receipts and outlays), Treasury securities auctions data (bills, notes, bonds, TIPS, FRNs since 1979), average interest rates on Treasury securities, Treasury reporting exchange rates (quarterly for 170+ currencies), I Bond and savings bond rates, TIPS/CPI data, and more. Supports filtering, sorting, pagination, and CSV/XML/JSON output formats
 - **GEO (Gene Expression Omnibus)** - NCBI's comprehensive public repository for high-throughput gene expression and functional genomics data. Contains 264K+ studies, 8M+ samples, and petabytes of data from microarray, RNA-seq, ChIP-seq, ATAC-seq, and other high-throughput experiments. Provides standardized data submission formats (MINIML, SOFT), programmatic access via Entrez Programming Utilities (E-utilities) and GEOquery R package, bulk FTP downloads, and web-based search and retrieval. Supports data mining, meta-analysis, differential expression analysis, and cross-study comparisons. Includes curated datasets, series records with experimental design, platform annotations, and sample metadata. Use cases: gene expression analysis, biomarker discovery, disease mechanism research, drug response studies, and functional genomics research
 - **GWAS Catalog** - NHGRI-EBI catalog of published genome-wide association studies with curated SNP-trait associations (thousands of studies, genome-wide significant associations p≤5×10⁻⁸), full summary statistics, REST API access for variant/trait/gene queries, and FTP downloads for genetic epidemiology and precision medicine research
 - **HMDB (Human Metabolome Database)** - Comprehensive metabolomics resource with 220K+ metabolite entries, detailed chemical/biological data, concentration ranges, disease associations, pathways, and spectral data for metabolite identification and biomarker discovery