refactor: rename environment variables and update related configurations

- Updated environment variable names from JERAPAH_FLOW_* to JFLOW_* for consistency and clarity.
- Adjusted database path handling in knexfile.js to reflect the new variable naming.
- Modified logging and retention days configurations to use the new variable names.
- Ensured that the JWT secret and secrets key checks are aligned with the new naming convention.
- Updated workflow test storage prefix to match the new project branding.

This refactor enhances the clarity of environment variable usage and aligns with the project's rebranding efforts.

packages/server/knexfile.js

@@ -2,12 +2,8 @@ import fs from "fs";
 import path from "path";
 import { DATA_DIR, SERVER_ROOT } from "./paths.js";
 
-const defaultNew = path.join(DATA_DIR, "jerapah-flow.db");
-const defaultLegacy = path.join(DATA_DIR, "scrunner.db");
 const dbPath =
-  process.env.JERAPAH_FLOW_DB_PATH ??
-  process.env.SCRUNNER_DB_PATH ??
-  (fs.existsSync(defaultLegacy) && !fs.existsSync(defaultNew) ? defaultLegacy : defaultNew);
+  process.env.JFLOW_DB_PATH ?? path.join(DATA_DIR, "jerapah-flow.db");
 fs.mkdirSync(path.dirname(dbPath), { recursive: true });
 
 /** @type {import("knex").Knex.Config} */