refactor: move internal headers to src/internal/ (#33)

* refactor: move internal headers to src/internal/

Move implementation-detail headers out of include/ to hide them from
library users. The public API now only exposes:
- profiler_manager.h
- web_server.h
- version.h
- profiler_version.h (generated)

Internal headers moved:
- symbolize.h
- embed_flamegraph.h
- embed_pprof.h
- web_resources.h

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

* fix: add missing cstring header for strerror

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

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: IronsDu

CMakeLists.txt

@@ -102,8 +102,6 @@ set(PROFILER_SOURCES
 
 set(PROFILER_HEADERS
     include/profiler_manager.h
-    include/symbolize.h
-    include/web_resources.h
     include/web_server.h
 )
 
@@ -129,6 +127,8 @@ target_include_directories(profiler_lib
     PUBLIC
         $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
         $<INSTALL_INTERFACE:include/cpp-remote-profiler>
+    PRIVATE
+        ${PROJECT_SOURCE_DIR}/src
 )
 
 # Example executable

include/profiler_manager.h

@@ -4,7 +4,6 @@
 #pragma once
 
 #include "profiler_version.h"
-#include "symbolize.h"
 #include <atomic>
 #include <map>
 #include <memory>
@@ -16,6 +15,9 @@
 
 PROFILER_NAMESPACE_BEGIN
 
+// Forward declaration
+class Symbolizer;
+
 /// @enum ProfilerType
 /// @brief Types of profiling operations supported
 enum class ProfilerType {

include/embed_flamegraph.h src/internal/embed_flamegraph.hinclude/embed_flamegraph.h renamed to src/internal/embed_flamegraph.h

@@ -1,13 +1,15 @@
 #include "profiler_manager.h"
 #include "absl/debugging/stacktrace.h"
 #include "absl/debugging/symbolize.h"
-#include "embed_flamegraph.h"
-#include "embed_pprof.h"
+#include "internal/embed_flamegraph.h"
+#include "internal/embed_pprof.h"
+#include "internal/symbolize.h"
 #include <algorithm>
 #include <atomic>
 #include <chrono>
 #include <cstdint>
 #include <cstdio>
+#include <cstring>
 #include <cxxabi.h>
 #include <dirent.h>
 #include <dlfcn.h>

include/embed_pprof.h src/internal/embed_pprof.hinclude/embed_pprof.h renamed to src/internal/embed_pprof.h

@@ -1,4 +1,4 @@
-#include "symbolize.h"
+#include "internal/symbolize.h"
 #include <absl/debugging/symbolize.h>
 #include <algorithm>
 #include <backward.hpp>

include/symbolize.h src/internal/symbolize.hinclude/symbolize.h renamed to src/internal/symbolize.h

@@ -1,4 +1,4 @@
-#include "web_resources.h"
+#include "internal/web_resources.h"
 #include <string>
 
 PROFILER_NAMESPACE_BEGIN

include/web_resources.h src/internal/web_resources.hinclude/web_resources.h renamed to src/internal/web_resources.h

@@ -1,6 +1,6 @@
 #include "web_server.h"
+#include "internal/web_resources.h"
 #include "profiler_manager.h"
-#include "web_resources.h"
 #include <drogon/drogon.h>
 #include <fstream>
 #include <iostream>