feat: redact secrets from tool results by default - #170

Adds default redaction and SHA-256 fingerprints for API-spec password-format fields in Appwrite tool results, with an opt-in reveal_secrets argument. The redaction applies to typed results and SDK parse-error payloads, while result views, resources, and tool guidance handle redacted responses. The pull request also updates the SDK dependency, catalog counts, tests, documentation, and flow diagrams; the latest commits make parse-error payloads honor the reveal option.