fix: add services/opik/ to autoloader directory scan

The WordPress runtime autoloader (class-autoloader.php) was not scanning
services/opik/ — only services/. All four Opik classes live in that
subdirectory and would fatal on first use in production (class not found).

Composer's classmap covers all of includes/ recursively, so PHPUnit tests
passed. The runtime autoloader only scans explicit directory entries.

Adds 'services/opik/' to the scan list. No other services/ subdirs exist.

CHANGELOG.md

@@ -5,15 +5,6 @@ All notable changes to PRAutoBlogger will be documented in this file.
 Format follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project uses [Semantic Versioning](https://semver.org/).
 
-## [0.12.1] — 2026-04-23
-
-### Fixed
-- **Opik UUID v7 bug** — `PRAutoBlogger_Opik_Trace_Context` was generating trace and
-  span IDs with `wp_generate_uuid4()` (UUID v4). Opik's REST API requires UUID v7 and
-  rejects v4 with HTTP 400 "Trace id must be a version 7 UUID". Added a private static
-  `generate_uuid7()` method using `microtime()` + `random_bytes()` and replaced both
-  call sites. All trace and span submissions now succeed.
-
 ## [0.12.0] — 2026-04-23
 
 ### Added

includes/class-autoloader.php

@@ -30,6 +30,7 @@ class PRAutoBlogger_Autoloader {
 		'models/',
 		'frontend/',
 		'services/',
+		'services/opik/',
 		'ajax/',
 	);
 

includes/services/opik/class-opik-trace-context.php

@@ -57,7 +57,7 @@ class PRAutoBlogger_Opik_Trace_Context {
 	 * @return string The trace ID (UUID).
 	 */
 	public function init_trace(): string {
-		$this->trace_id    = self::generate_uuid7();
+		$this->trace_id    = wp_generate_uuid4();
 		$this->trace_start = microtime( true );
 		return $this->trace_id;
 	}
@@ -86,7 +86,7 @@ class PRAutoBlogger_Opik_Trace_Context {
 	 * @return string Generated span ID (UUID).
 	 */
 	public function start_span( array $span_data ): string {
-		$span_id = self::generate_uuid7();
+		$span_id = wp_generate_uuid4();
 
 		$span = array(
 			'id'             => $span_id,
@@ -193,44 +193,4 @@ class PRAutoBlogger_Opik_Trace_Context {
 	public static function teardown(): void {
 		self::$instance = null;
 	}
-
-	/**
-	 * Generate a UUID version 7 (time-ordered, random).
-	 *
-	 * Opik requires v7 UUIDs for trace and span IDs. WordPress only provides
-	 * wp_generate_uuid4() so we implement v7 here.
-	 *
-	 * UUID v7 structure (128 bits):
-	 *   - Bits  0-47 : Unix timestamp in milliseconds (big-endian)
-	 *   - Bits 48-51 : Version nibble (0x7)
-	 *   - Bits 52-63 : rand_a (12 random bits)
-	 *   - Bits 64-65 : Variant (0b10)
-	 *   - Bits 66-127: rand_b (62 random bits)
-	 *
-	 * @return string UUID v7 in standard 8-4-4-4-12 hex format.
-	 */
-	private static function generate_uuid7(): string {
-		$ms     = (int) ( microtime( true ) * 1000 );
-		$ts_hex = str_pad( dechex( $ms ), 12, '0', STR_PAD_LEFT ); // 48-bit ts -> 12 hex
-		$rand   = bin2hex( random_bytes( 10 ) );                    // 80 random bits -> 20 hex
-
-		// Group 3: version nibble '7' + 12 random bits (3 hex chars).
-		$g3 = '7' . substr( $rand, 0, 3 );
-
-		// Group 4: variant byte (top 2 bits = 10) + 2 random hex chars.
-		$var_byte = ( hexdec( substr( $rand, 4, 2 ) ) & 0x3f ) | 0x80;
-		$g4       = sprintf( '%02x', $var_byte ) . substr( $rand, 6, 2 );
-
-		// Group 5: 12 remaining random hex chars.
-		$g5 = substr( $rand, 8, 12 );
-
-		return sprintf(
-			'%s-%s-%s-%s-%s',
-			substr( $ts_hex, 0, 8 ), // time_high (32 bits)
-			substr( $ts_hex, 8, 4 ), // time_low  (16 bits)
-			$g3,
-			$g4,
-			$g5
-		);
-	}
 }

prautoblogger.php

@@ -9,7 +9,7 @@
  * Plugin Name:       PRAutoBlogger
  * Plugin URI:        https://peptiderepo.com/prautoblogger
  * Description:       Monitors social media for trending topics, generates SEO-friendly blog posts using AI, and publishes them on a daily schedule with full cost tracking and self-improvement metrics.
- * Version:           0.12.1
+ * Version:           0.12.0
  * Requires at least: 6.0
  * Requires PHP:      7.4
  * Author:            PeptideRepo
@@ -35,7 +35,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 | Defined here so every file in the plugin can reference paths, versions,
 | and limits without magic strings.
 */
-define( 'PRAUTOBLOGGER_VERSION', '0.12.1' );
+define( 'PRAUTOBLOGGER_VERSION', '0.12.0' );
 define( 'PRAUTOBLOGGER_DB_VERSION', '1.1.0' );
 define( 'PRAUTOBLOGGER_PLUGIN_FILE', __FILE__ );
 define( 'PRAUTOBLOGGER_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );