Migrate addon to Wealthfolio network API

[alexander-schneider]

Summary

• migrate Adanos requests from direct fetch() to Wealthfolio's brokered network.request() API
• declare the Adanos host, sandbox-compatible routes, permissions, and Wealthfolio 3.7 host dependencies
• replace sandbox-blocked localStorage usage with addon-scoped durable storage
• replace deprecated days queries with explicit inclusive UTC from and to dates
• make the repository independently buildable and document release-file installation

Verification

• pnpm test (20 passed)
• pnpm type-check
• pnpm bundle
• pnpm exec wealthfolio test
• SDK validateManifest() (valid, no warnings)
• unzip -t dist/adanos-sentiment-1.1.0.zip
• git diff --check

Follow-up to wealthfolio/wealthfolio#741 and maintainer feedback in wealthfolio/wealthfolio#741 (comment).