chore: bump version to 1.7.7 and update CHANGELOG

Author: diegosouzapw

CHANGELOG.md

@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ---
 
+## [1.7.7] — 2026-03-02
+
+### 🐛 Bug Fixes
+
+- **Gemini Tool Schema Sanitization** — The standard Gemini provider now sanitizes OpenAI tool schemas before forwarding to Gemini API, removing unsupported JSON Schema keywords (`additionalProperties`, `$schema`, `const`, `default`, `not`, etc.). Previously, sanitization only ran in the CLI executor path, causing Gemini to reject tool calls when schemas contained unsupported constraints. Also applied sanitization to `response_format.json_schema`. Fixes #173
+
 ## [1.7.6] — 2026-03-02
 
 ### 🐛 Bug Fixes

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "omniroute",
-  "version": "1.7.6",
+  "version": "1.7.7",
   "description": "Smart AI Router with auto fallback — route to FREE & cheap models, zero downtime. Works with Cursor, Cline, Claude Desktop, Codex, and any OpenAI-compatible tool.",
   "type": "module",
   "bin": {