Demoted pyinstrument due to breaking changes upgrade

Author: pcrespov

services/web/server/requirements/_packages.in

@@ -8,3 +8,8 @@
 --requirement ../../../../packages/postgres-database/requirements/_base.in
 --requirement ../../../../packages/service-library/requirements/_base.in
 --requirement ../../../../packages/service-library/requirements/_aiohttp.in
+
+# BREAKING CHANGES
+#  https://github.com/joerick/pyinstrument#v400release
+# RuntimeError: There is already a profiler running. You cannot run multiple profilers in the same thread or async context, unless you disable async support.
+pyinstrument<4

services/web/server/requirements/_packages.txt

@@ -108,10 +108,13 @@ pydantic==1.8.2
     #   -c requirements/_base.txt
     #   -r requirements/../../../../packages/models-library/requirements/_base.in
     #   -r requirements/../../../../packages/service-library/requirements/_base.in
-pyinstrument==4.0.3
+pyinstrument==3.4.2
     # via
     #   -c requirements/../../../../packages/service-library/requirements/./_base.in
     #   -r requirements/../../../../packages/service-library/requirements/_base.in
+    #   -r requirements/_packages.in
+pyinstrument-cext==0.2.4
+    # via pyinstrument
 pyrsistent==0.18.0
     # via jsonschema
 pyyaml==5.4.1