Update CHANGELOG.md for v1.3.0 release

Author: jstirnaman

CHANGELOG.md

@@ -5,25 +5,31 @@ All notable changes to the official InfluxDB MCP Server will be documented in th
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [1.3.0] - 2026-03-24
+## [1.3.0] - 2026-03-26
 
 ### Added
 
 - **E2E test suite**: Protocol compliance tests (vitest) that verify server startup, MCP handshake, tool/resource/prompt registration, and error handling — no InfluxDB required
 - **Integration tests**: Live InfluxDB tests for `health_check`, `list_databases`, and `execute_query`, gated behind `INFLUX_TEST_ENABLED`
-- **CI workflow**: GitHub Actions with protocol tests on every PR and integration tests against InfluxDB 3 Core via Docker
+- **Error-path unit tests**: Tests with recorded error fixtures from live Core and Cloud Serverless instances covering JSON, plain-text, and `{code, message}` error formats
+- **CI workflow**: GitHub Actions with protocol tests on every PR, integration tests against InfluxDB 3 Core via Docker, and Cloud Serverless integration tests via GitHub environment secrets
 - **Docker test infrastructure**: `docker-compose.test.yml` for local Core testing with preconfigured admin token
+- **Version consistency CI check**: Verifies `package.json`, `config.ts`, and `CHANGELOG.md` versions match on every PR
 - **CLAUDE.md**: Architecture overview and codebase conventions for Claude Code
 - **Claude Code skills**: Build/run workflow for Core/Enterprise and testing workflow
 
 ### Fixed
 
 - Server-level error catch now sets `isError: true`, consistent with handler-level error responses
+- Plain-text error responses from InfluxDB Core (HTTP 500) are now surfaced in all 4 services instead of falling through to generic "Internal Server Error"
+- Query error handler now checks `data.message` for Cloud Serverless `{code, message}` JSON error format, matching the other 3 services
 
 ### Changed
 
 - Minimum Node.js version raised to v20.11 (Node 18 is EOL; vitest 4.x and `import.meta.dirname` require v20.11+)
 - `@modelcontextprotocol/sdk` updated from `^1.12.1` to `^1.27.1`
+- All dependencies updated to latest within semver ranges
+- Version aligned across `package.json`, `config.ts`, and `CHANGELOG.md` (previously divergent)
 
 ## [1.2.0] - 2025-11-05