v5.15.2

Bug Fixes

• Fix confusing NoneType error when company facts download fails (#638)
• Fix standardization layer returning empty for all IFRS filers (#637)
• Fix local storage returning only 1000 filings by merging pagination files (#636)
• Fix strict unit matching when user explicitly specifies unit parameter
• Fix additional ifrs-full: prefix gaps in TTM and EPS derivation

UX Improvements

• Improve UX for transient company facts failures — clear warning message and retry-safe caching

Documentation

• Add premium docs theme with cleaner nav, dark mode, and image polish
• Replace 13F user guide with screenshot-rich institutional holdings guide
• Add content-creator skill, agent, and institutional holdings guide
• Rewrite Filing/Filings and Entity docs for accuracy, SEO, and AI discoverability
• Add documentation for NPORT-P
• Add SEO optimization to README and ReadTheDocs pages
• Add shares_outstanding and public_float to key documentation pages