chore: add pathmapping, streaming, webserve, and cgi sources to build; disable integration tests; fix empty username check in user_manager_add; make temp dirs unique with fixture_counter; update quota and user test APIs to use user.id and cast quota_bytes

Makefile

@@ -21,7 +21,8 @@ COMMON_SRCS = \
     src/core/config.c \
     src/core/logging.c \
     src/user/usermgr.c \
-    src/user/password.c
+    src/user/password.c \
+    src/storage/pathmapping.c
 
 SERVER_SRCS = \
     src/main.c \
@@ -29,6 +30,8 @@ SERVER_SRCS = \
     src/http/parser.c \
     src/http/response.c \
     src/http/headers.c \
+    src/http/streaming.c \
+    src/http/webserve.c \
     src/webdav/xml.c \
     src/webdav/methods.c \
     src/webdav/propfind.c \
@@ -38,6 +41,7 @@ SERVER_SRCS = \
     src/storage/properties.c \
     src/storage/locks.c \
     src/auth/auth.c \
+    src/cgi/cgi.c \
     src/concurrency/threadpool.c \
     src/concurrency/eventloop.c \
     src/concurrency/connpool.c