chore(template): add APP_VERSION and HEALTH_DB_TIMEOUT_MS to env templates

The new /health endpoint reads these from c.env (Workers) or process.env
(Node). Adds them to:

- .dev.vars.example (Workers local dev)
- .env.example (Node local dev)
- wrangler.toml [vars], [env.staging.vars], [env.production.vars]

APP_VERSION mirrors package.json so generated projects ship with a real
value out of the box; HEALTH_DB_TIMEOUT_MS defaults to 2000 ms so the
DB ping fails fast under network partition.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Paul Mulligan

scripts/setup-project.sh

@@ -29,13 +29,17 @@ id = "<YOUR_HYPERDRIVE_ID>"
 [vars]
 ENVIRONMENT = "development"
 LOG_LEVEL = "debug"
+APP_VERSION = "0.0.1"
+HEALTH_DB_TIMEOUT_MS = "2000"
 
 # Staging environment
 [env.staging]
 name = "nerva-api-staging"
 [env.staging.vars]
 ENVIRONMENT = "staging"
 LOG_LEVEL = "info"
+APP_VERSION = "0.0.1"
+HEALTH_DB_TIMEOUT_MS = "2000"
 
 [[env.staging.d1_databases]]
 binding = "DB"
@@ -59,6 +63,8 @@ routes = [
 [env.production.vars]
 ENVIRONMENT = "production"
 LOG_LEVEL = "warn"
+APP_VERSION = "0.0.1"
+HEALTH_DB_TIMEOUT_MS = "2000"
 
 [[env.production.d1_databases]]
 binding = "DB"