chore: update n8n to v1.116.2 (#348)

* docs: Update CLAUDE.md with development notes

* chore: update n8n to v1.116.2

- Updated n8n from 1.115.2 to 1.116.2
- Updated n8n-core from 1.114.0 to 1.115.1
- Updated n8n-workflow from 1.112.0 to 1.113.0
- Updated @n8n/n8n-nodes-langchain from 1.114.1 to 1.115.1
- Rebuilt node database with 542 nodes
- Updated version to 2.20.7
- Updated n8n version badge in README
- All changes will be validated in CI with full test suite

Conceived by Romuald Członkowski - www.aiadvisors.pl/en

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

* fix: regenerate package-lock.json to sync with updated dependencies

Fixes CI failure caused by package-lock.json being out of sync with
the updated n8n dependencies.

- Regenerated with npm install to ensure all dependency versions match
- Resolves "npm ci" sync errors in CI pipeline

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

* fix: align FTS5 tests with production boosting logic

Tests were failing because they used raw FTS5 ranking instead of the
exact-match boosting logic that production uses. Updated both test files
to replicate production search behavior from src/mcp/server.ts.

- Updated node-fts5-search.test.ts to use production boosting
- Updated database-population.test.ts to use production boosting
- Both tests now use JOIN + CASE statement for exact-match prioritization

This makes tests more accurate and less brittle to FTS5 ranking changes.

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

* fix: prioritize exact matches in FTS5 search with case-insensitive comparison

Root cause: SQL ORDER BY was sorting by FTS5 rank first, then CASE statement.
Since ranks are unique, the CASE boosting never applied. Additionally, the
CASE statement used case-sensitive comparison which failed to match nodes
like "Webhook" when searching for "webhook".

Changes:
- Changed ORDER BY from "rank, CASE" to "CASE, rank" in production code
- Added LOWER() for case-insensitive exact match detection
- Updated both test files to match the corrected SQL logic
- Exact matches now consistently rank first regardless of FTS5 score

Impact:
- Improves search quality by ensuring exact matches appear first
- More efficient SQL (less JavaScript sorting needed)
- Tests now accurately validate production search behavior
- Fixes 2/705 failing integration tests

Verified:
- Both tests pass locally after fix
- SQL query tested with SQLite CLI showing webhook ranks 1st

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

* docs: update CHANGELOG with FTS5 search fix details

Added comprehensive documentation for the FTS5 search ranking bug fix:
- Problem description with SQL examples showing wrong ORDER BY
- Root cause analysis explaining why CASE statement never applied
- Case-sensitivity issue details
- Complete fix description for production code and tests
- Impact section covering search quality, performance, and testing
- Verified search results showing exact matches ranking first

This documents the critical bug fix that ensures exact matches
appear first in search results (webhook, http, code, etc.) with
case-insensitive matching.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

---------

Co-authored-by: Claude <noreply@anthropic.com>

README.md

@@ -5,7 +5,7 @@
 [![npm version](https://img.shields.io/npm/v/n8n-mcp.svg)](https://www.npmjs.com/package/n8n-mcp)
 [![codecov](https://codecov.io/gh/czlonkowski/n8n-mcp/graph/badge.svg?token=YOUR_TOKEN)](https://codecov.io/gh/czlonkowski/n8n-mcp)
 [![Tests](https://img.shields.io/badge/tests-3336%20passing-brightgreen.svg)](https://github.com/czlonkowski/n8n-mcp/actions)
-[![n8n version](https://img.shields.io/badge/n8n-^1.115.2-orange.svg)](https://github.com/n8n-io/n8n)
+[![n8n version](https://img.shields.io/badge/n8n-^1.116.2-orange.svg)](https://github.com/n8n-io/n8n)
 [![Docker](https://img.shields.io/badge/docker-ghcr.io%2Fczlonkowski%2Fn8n--mcp-green.svg)](https://github.com/czlonkowski/n8n-mcp/pkgs/container/n8n-mcp)
 [![Deploy on Railway](https://railway.com/button.svg)](https://railway.com/deploy/n8n-mcp?referralCode=n8n-mcp)