Configuration and logging move out of the context source

context.cpp had grown to hold three unrelated concerns: the context
lifecycle, everything about the .conf file format, and everything about
writing a log message.

conf.cpp now owns the format end to end - parsing a file into the store,
reading values back out, and interpreting a configured string as the
boolean or log level a setting holds. logging.cpp owns the write path:
the level filter, the stream choice, and the name a level carries in
output.

context.cpp keeps what a context is: resolving each setting from the
override, the configured value, or the built-in default, and reporting
what it resolved.

include/internal/conf.hpp

@@ -0,0 +1,61 @@
+/**
+ * @file conf.hpp
+ * @brief Reading the .conf files, and interpreting the values they carry
+ *
+ * @copyright Copyright (c) 2026 SILO GROUP LLC
+ * @author Chris Punches <chris.punches@silogroup.org>
+ *
+ * Part of the Dark Horse Linux Package Manager (DPM)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <string>
+
+struct dpm_ctx;
+
+namespace dpm_core {
+    /**
+     * @brief Reads every .conf file in a context's configuration directory
+     *
+     * Each file becomes one namespace in the store, named after the file
+     * without its extension, so core.conf fills "core" and mymodule.conf
+     * fills "mymodule". Files with any other extension are ignored.
+     *
+     * A missing or unreadable directory leaves the store empty, which
+     * leaves every setting at its default.
+     *
+     * @param ctx The libdpm-core.so context
+     */
+    void load_config_dir(dpm_ctx* ctx);
+
+    /**
+     * @brief Interprets a configured boolean value
+     *
+     * @param v The configured value
+     * @param fallback Returned when the value matches no known spelling
+     * @return The interpreted boolean, or the fallback
+     */
+    bool parse_bool(const std::string& v, bool fallback);
+
+    /**
+     * @brief Maps a configured log level name to its numeric level
+     *
+     * @param v The level name read from configuration
+     * @param fallback Returned when the name is unrecognized
+     * @return A DPM_LOG_* value, or the fallback
+     */
+    int log_level_str2enum(const std::string& v, int fallback);
+} // namespace dpm_core