Pluggable persistence for OAuth tokens, keyed by the canonical resource (MCP server) URI. Implementations may encrypt at rest; the default FileTokenStore documents an encryption hook.
Load the stored token for resource, or a default-constructed StoredToken (hasToken == false) when none is stored.
Persist token for resource, replacing any previous value.
Pluggable persistence for OAuth tokens, keyed by the canonical resource (MCP server) URI. Implementations may encrypt at rest; the default FileTokenStore documents an encryption hook.