feat: Add runtime metrics for HTTP requests and database queries (v0.1.0)

- Add RuntimeCollector class for tracking request lifecycle metrics
- Add wordpress_http_requests_total counter (method, status, endpoint)
- Add wordpress_http_request_duration_seconds histogram
- Add wordpress_db_queries_total counter (endpoint)
- Add wordpress_db_query_duration_seconds histogram (requires SAVEQUERIES)
- Update Collector to expose stored runtime metrics
- Add new settings options for enabling/disabling runtime metrics
- Create translation files (.pot, .po, .mo) for internationalization
- Update documentation and changelog

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

languages/wp-prometheus.pot

@@ -0,0 +1,195 @@
+# Copyright (C) 2026 Marco Graetsch
+# This file is distributed under the GPL v2 or later.
+msgid ""
+msgstr ""
+"Project-Id-Version: WP Prometheus 0.1.0\n"
+"Report-Msgid-Bugs-To: https://src.bundespruefstelle.ch/magdev/wp-prometheus/issues\n"
+"POT-Creation-Date: 2026-02-02T00:00:00+00:00\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"PO-Revision-Date: 2026-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+
+#: src/Admin/Settings.php:40
+msgid "Metrics Settings"
+msgstr ""
+
+#: src/Admin/Settings.php:41
+msgid "Metrics"
+msgstr ""
+
+#: src/Admin/Settings.php:58
+msgid "License Settings"
+msgstr ""
+
+#: src/Admin/Settings.php:65
+msgid "Authentication"
+msgstr ""
+
+#: src/Admin/Settings.php:73
+msgid "Default Metrics"
+msgstr ""
+
+#: src/Admin/Settings.php:150
+msgid "License settings saved."
+msgstr ""
+
+#: src/Admin/Settings.php:195
+msgid "License is active and valid."
+msgstr ""
+
+#: src/Admin/Settings.php:196
+msgid "License is invalid."
+msgstr ""
+
+#: src/Admin/Settings.php:197
+msgid "License has expired."
+msgstr ""
+
+#: src/Admin/Settings.php:198
+msgid "License has been revoked."
+msgstr ""
+
+#: src/Admin/Settings.php:199
+msgid "License is inactive."
+msgstr ""
+
+#: src/Admin/Settings.php:200
+msgid "License has not been validated yet."
+msgstr ""
+
+#: src/Admin/Settings.php:201
+msgid "License server is not configured."
+msgstr ""
+
+#. translators: %s: Expiration date
+#: src/Admin/Settings.php:214
+msgid "Expires: %s"
+msgstr ""
+
+#. translators: %s: Time ago
+#: src/Admin/Settings.php:225
+msgid "Last checked: %s ago"
+msgstr ""
+
+#: src/Admin/Settings.php:239
+msgid "License Server URL"
+msgstr ""
+
+#: src/Admin/Settings.php:249
+msgid "License Key"
+msgstr ""
+
+#: src/Admin/Settings.php:259
+msgid "Server Secret"
+msgstr ""
+
+#: src/Admin/Settings.php:264
+msgid "Leave empty to keep existing."
+msgstr ""
+
+#: src/Admin/Settings.php:270
+msgid "Save License Settings"
+msgstr ""
+
+#: src/Admin/Settings.php:272
+msgid "Validate License"
+msgstr ""
+
+#: src/Admin/Settings.php:275
+msgid "Activate License"
+msgstr ""
+
+#: src/Admin/Settings.php:301
+msgid "Configure authentication for the /metrics endpoint."
+msgstr ""
+
+#: src/Admin/Settings.php:310
+msgid "Select which default metrics to expose."
+msgstr ""
+
+#: src/Admin/Settings.php:324
+msgid "Regenerate"
+msgstr ""
+
+#: src/Admin/Settings.php:327
+msgid "Use this token to authenticate Prometheus scrape requests."
+msgstr ""
+
+#: src/Admin/Settings.php:340
+msgid "WordPress Info (version, PHP version, multisite)"
+msgstr ""
+
+#: src/Admin/Settings.php:341
+msgid "Total Users by Role"
+msgstr ""
+
+#: src/Admin/Settings.php:342
+msgid "Total Posts by Type and Status"
+msgstr ""
+
+#: src/Admin/Settings.php:343
+msgid "Total Comments by Status"
+msgstr ""
+
+#: src/Admin/Settings.php:344
+msgid "Total Plugins (active/inactive)"
+msgstr ""
+
+#: src/Admin/Settings.php:345
+msgid "HTTP Requests Total (by method, status, endpoint)"
+msgstr ""
+
+#: src/Admin/Settings.php:346
+msgid "HTTP Request Duration (histogram)"
+msgstr ""
+
+#: src/Admin/Settings.php:347
+msgid "Database Queries Total (by endpoint)"
+msgstr ""
+
+#: src/Admin/Settings.php:369
+msgid "Prometheus Configuration"
+msgstr ""
+
+#: src/Admin/Settings.php:370
+msgid "Add the following to your prometheus.yml:"
+msgstr ""
+
+#. translators: %s: Endpoint URL
+#: src/Admin/Settings.php:385
+msgid "Metrics endpoint: %s"
+msgstr ""
+
+#: src/Admin/Settings.php:93
+msgid "Auth Token"
+msgstr ""
+
+#: src/Admin/Settings.php:101
+msgid "Enabled Metrics"
+msgstr ""
+
+#: src/Plugin.php:120
+msgid "Settings"
+msgstr ""
+
+#. translators: 1: Required PHP version, 2: Current PHP version
+#: wp-prometheus.php:112
+msgid "WP Prometheus requires PHP version %1$s or higher. You are running PHP %2$s."
+msgstr ""
+
+#. translators: 1: Required WordPress version, 2: Current WordPress version
+#: wp-prometheus.php:127
+msgid "WP Prometheus requires WordPress version %1$s or higher. You are running WordPress %2$s."
+msgstr ""
+
+#: wp-prometheus.php:140
+msgid "WP Prometheus requires Composer dependencies to be installed. Please run \"composer install\" in the plugin directory."
+msgstr ""
+
+#. translators: %s: Required PHP version
+#: wp-prometheus.php:156
+msgid "WP Prometheus requires PHP version %s or higher."
+msgstr ""