fix(tasks): send recurrency/reminder as flat top-level params (v1.1.1)

FiZ Ai() encoder does not support nested objects — recurrencyDescriptor
and reminder fields must be top-level params (recurrency=WEEKLY, not
recurrencyDescriptor={recurrency:WEEKLY}). Same fix for reminder fields.
SPEC.md and CLAUDE.md updated to document the flat encoding.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -10,6 +10,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 This project follows Semantic Versioning (SemVer).
 Breaking changes (removed tools, changed parameters) increment the major version.
 
+## [1.1.1] – 2026-04-17
+
+### Fixed
+- `update_task`: recurrency and reminder fields now sent as flat top-level parameters
+  instead of nested objects — the FiZ `Ai()` encoder does not support nested objects;
+  `recurrencyDescriptor`/`reminder` keys are never sent, fields go directly to top level
+  (e.g. `recurrency=WEEKLY`, `reminderUnit=DAY` rather than `recurrencyDescriptor={...}`)
+- SPEC.md and CLAUDE.md corrected to document the flat encoding
+
+---
+
 ## [1.1.0] – 2026-04-17
 
 ### Added