Improve Almanac cross-year weekly data

Add Almanac accuracy and snapshot APIs

Add Almanac accuracy seed inputs

Fix late-year almanac seasonal signals

Cache SEC ticker snapshot for faster validation

Use JSON fallback for almanac demo data

Sync almanac and FinBERT updates from IRIS-AI

Sync localhost changes after aa6da6b into demo

feat: add ticker autocomplete with local database prefix search

feat: add local ticker database with SEC data download and fuzzy matching

fix: normalise LLM headlines schema, regenerate report files

fix: add LLM_reports alias dir and harden demo path resolution

Add LLM report data: ChatGPT, DeepSeek, and Gemini forecast records