feat: upgrade Node.js to 24.14.0 and ws-worker to 1.23.3 + database name env hooks for local dev

[stuartc]

Description

This PR upgrades Node.js from 22.12.0 to 24.14.0 (matching the kit repo) and
bumps ws-worker to 1.23.3, which includes @openfn/runtime 1.9.0 with an ESM
resolve hook required for Node 24's stricter module resolution.

Also makes dev/test database names configurable via DEV_DATABASE_NAME and
TEST_DATABASE_NAME environment variables (defaulting to the existing names).
This is useful when working on multiple checkouts or related repos (e.g.
lightning and thunderbolt) simultaneously, allowing each to use separate
databases without conflicts. Without this, developers need to pass
DATABASE_URL on every command or risk collisions between repos sharing the
same Postgres instance.

Validation steps

1. Verify CI passes with Node 24.14.0
2. Run mix test test/integration/web_and_worker_test.exs — confirms ws-worker
   executes jobs correctly under Node 24
3. Run npm test in assets/ — all 2569 frontend tests pass
4. Verify Docker builds succeed with ARG NODE_VERSION=24.14.0

Additional notes for the reviewer

1. Node 24 enforces strict ESM resolution (requires .js extensions for subpath
   imports). The fix is in @openfn/runtime 1.9.0 (bundled with ws-worker 1.23.3)
   which registers a custom ESM resolve hook to handle this transparently.
2. The @tsconfig/node-lts and @types/node packages were bumped to v24.
3. The database name env vars (DEV_DATABASE_NAME, TEST_DATABASE_NAME) are
   opt-in — defaults are unchanged, so no impact on existing setups. Pair with a
   .envrc (gitignored) and direnv for a seamless per-checkout experience.

AI Usage

• I have used Claude Code
• I have used another model
• I have not used AI

Pre-submission checklist

• I have performed an AI review of my code
• I have implemented and tested all related authorization policies.
• I have updated the changelog.
• I have ticked a box in "AI usage" in this PR

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.51%. Comparing base (bf0687f) to head (9f052d5).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4603      +/-   ##
==========================================
+ Coverage   89.50%   89.51%   +0.01%     
==========================================
  Files         441      441              
  Lines       21295    21295              
==========================================
+ Hits        19060    19063       +3     
+ Misses       2235     2232       -3     

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