Indent every scope and put opening braces on the signature line

Namespace and extern "C" bodies are indented a level, so nesting is
visible from the indentation rather than only from the braces. Opening
braces stay on the line that opens the scope, including function
definitions, which previously carried theirs on a line of their own.

include/internal/modules.hpp

@@ -65,20 +65,18 @@ struct dpm_cursor {
 void dpm_internal_unload(void* handle);
 
 namespace dpm_core {
-
-/**
- * @brief Runs the full load-time validation sequence against a module
- *
- * Loads the named module's .so from the context's module path and
- * verifies the complete contract.
- *
- * @param ctx The libdpm-core context
- * @param name The module name
- * @param reason Receives the refusal reason on failure
- * @return The validated module (caller owns), or nullptr on failure
- */
-std::unique_ptr<dpm_module> validate_and_load(dpm_ctx* ctx,
-                                              const std::string& name,
-                                              std::string& reason);
-
+    /**
+     * @brief Runs the full load-time validation sequence against a module
+     *
+     * Loads the named module's .so from the context's module path and
+     * verifies the complete contract.
+     *
+     * @param ctx The libdpm-core context
+     * @param name The module name
+     * @param reason Receives the refusal reason on failure
+     * @return The validated module (caller owns), or nullptr on failure
+     */
+    std::unique_ptr<dpm_module> validate_and_load(dpm_ctx* ctx,
+                                                  const std::string& name,
+                                                  std::string& reason);
 } // namespace dpm_core