ci: add avoidEscape to @stylistic/quotes ESLint rule to resolve Prettier conflict

[Justus-at-Tazama]

Problem

The @stylistic/quotes ESLint rule is configured as ['error', 'single'], which defaults to avoidEscape: false. This means ESLint always requires single quotes, even for strings that contain single quotes (which would require escaping).

Prettier is configured with "singleQuote": true, but Prettier unconditionally switches to double quotes when a string contains single quotes, to avoid escaping. This creates a persistent conflict:

1. Pre-commit lint-staged runs eslint --fix (converts to single-quoted with escaping), then prettier --write (reverts to double-quoted)
2. Committed code has double-quoted strings
3. CI lint:eslint fails with Strings must use singlequote @stylistic/quotes

This has been observed in src/services/node.logic.service.ts and previously in src/app.controller.ts and src/repositories/configuration/simulation-logs.repository.ts.

Fix

Change the @stylistic/quotes rule in eslint.config.mjs to include avoidEscape: true:

- '@stylistic/quotes': ['error', 'single'],
+ '@stylistic/quotes': ['error', 'single', { avoidEscape: true }],

This aligns ESLint with Prettier's behaviour - both tools will agree that strings containing single quotes may use double quotes. The same fix has already been applied to the frmscoe/rule-* modules.

Acceptance criteria

• eslint.config.mjs has '@stylistic/quotes': ['error', 'single', { avoidEscape: true }]
• npm run lint:eslint passes on all active feature branches without manual quote escaping
• No regression on existing single-quote enforcement for strings that do not contain single quotes