🐛 Fix intermittent env loading failures

[retlehs]

Summary

• Replace USE_ENV_ARRAY with LOCAL_FIRST in Env\Env::$options
• Replace magic-number config (31) with explicit bit flags for readability and intent

Fixes #756

Problem

USE_ENV_ARRAY forces oscarotero/env to read from $_ENV only. In #756, multiple users reported intermittent misses in some contexts (notably WP-CLI and sequential command flows), where env() returns null for expected values (e.g. DB_HOST), leading to fallback behavior like localhost and database connection failures.

Fix

Set Env\Env::$options explicitly to CONVERT_BOOL | CONVERT_NULL | CONVERT_INT | STRIP_QUOTES | LOCAL_FIRST.

This changes lookup to getenv() (local first), which aligns with Bedrock's dotenv repository setup that includes PutenvAdapter, while still avoiding $_SERVER (the security goal of #598).

Test results

Tested on a Trellis VM running Bedrock with this change applied:

Basic env loading:

$ trellis vm shell -- wp eval 'echo env("DB_HOST") . " " . env("DB_NAME") . " " . env("WP_HOME");'
localhost example_com_development http://example.test

Nested WP-CLI commands (the reported #756 failure case):

$ trellis vm shell -- wp eval 'echo "outer: " . env("DB_HOST") . PHP_EOL; WP_CLI::runcommand("eval \"echo \\\"inner: \\\" . env(\\\"DB_HOST\\\") . PHP_EOL;\"");'
outer: localhost
inner: localhost

wp rewrite structure (triggers internal rewrite flush, another reported failure):

$ trellis vm shell -- wp rewrite structure '/%postname%/'
Success: Rewrite structure set.
Success: Rewrite rules flushed.

Repeated read consistency:

$ trellis vm shell -- wp eval 'for ($i = 0; $i < 5; $i++) { echo env("DB_HOST") . " "; }'
localhost localhost localhost localhost localhost
Consistent: yes

$_SERVER not leaking .env secrets (#598 security intent preserved):

$ trellis vm shell -- wp eval 'echo "SERVER has DB_HOST: " . (isset($_SERVER["DB_HOST"]) ? "YES (leak!)" : "no");'
SERVER has DB_HOST: no

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