prepare release 1.14.0

[vikrantpuppala]

Summary

Bump version to 1.14.0 and add the 1.14.0 entry to CHANGELOG.md.

Notable changes since 1.13.0

• Add statement-level query tag support (Statement level query tag in NodeJS connector #366)
• Add AI coding agent detection to User-Agent header ([PECOBLR-1928] Add AI coding agent detection to User-Agent header #333)
• Internal: telemetry infrastructure improvements — circuit breaker, feature flag cache, telemetry client management (off by default) ([2/7] Telemetry Infrastructure: CircuitBreaker and FeatureFlagCache #325, [3/7] Telemetry Client Management: TelemetryClient and Provider #326, fix: route telemetry HTTP through shared connection stack; fix close() flush race #362)

CI-only / infra changes are omitted from user-facing notes (workflow hardening, dependabot, etc.).

Test plan

• npm install --package-lock-only updates only version fields in lockfile
• npm run build clean
• CI green
• Local npm test blocked by lz4 native build in sandbox; CI runs it

Next steps after merge

1. Tag the merge commit as 1.14.0 and push the tag (no v prefix per repo convention)
2. Trigger peco-databricks-sql-nodejs in secure-public-registry-releases-eng with ref=1.14.0, dry-run=true
3. Re-run with dry-run=false for the actual release

This pull request was AI-assisted by Isaac.