refactor: convert pg commands & libs to esm - part 15

[zwhitfield3]

Summary

Converts additional pg commands and their associated tests to ESM as part of the v11.0.0 upgrade.

Commands migrated:

• pg:info - Display database information
• pg:kill - Kill a backend connection
• pg:killall - Terminate all backend connections
• pg:locks - Display queries holding locks on your database
• pg:outliers - Show queries that have longest execution time
• pg:promote - Sets DATABASE as your DATABASE_URL

Libraries updated:

• lib/pg/fetcher.ts - Removed unnecessary imports
• lib/pg/psql.ts - Updated to use ESM exports

Tests migrated:

• pg:info unit tests
• pg:killall unit tests
• pg:promote unit tests

Type of Change

Breaking Changes (major semver update)

• Add a ! after your change type to denote a change that breaks current behavior

Feature Additions (minor semver update)

• feat: Introduces a new feature to the codebase

Patch Updates (patch semver update)

• fix: Bug fix
• perf: Performance improvement
• deps: Dependency upgrade
• revert: Revert a previous commit
• docs: Documentation change
• style: Styling update
• chore: Change that does not affect production code
• refactor: Refactoring existing code without changing behavior
• tests: Add/update/remove tests
• build: Change to the build system
• ci: Continuous integration workflow update

Testing

Notes:
Requires a Postgres database provisioned on a Heroku app.

Steps:
Pull down branch, npm install && npm run build

# Show help for migrated commands
./bin/run pg:info --help
./bin/run pg:kill --help
./bin/run pg:killall --help
./bin/run pg:locks --help
./bin/run pg:outliers --help
./bin/run pg:promote --help

# Test pg:info - Display database information
./bin/run pg:info --app $APP DATABASE_URL

# Test pg:locks - Display queries holding locks
./bin/run pg:locks --app $APP DATABASE_URL

# Test pg:outliers - Show longest running queries
./bin/run pg:outliers --app $APP DATABASE_URL

# Test pg:killall - Terminate all connections (use with caution!)
./bin/run pg:killall --app $APP DATABASE_URL

# Test pg:promote - Promote a database to DATABASE_URL
# (Requires a follower or other database to promote)
./bin/run pg:promote --app $APP HEROKU_POSTGRESQL_FOLLOWER_URL

Related Issues

GitHub issue: #
GUS work item: W-19701144