fix: EOS run asynchronous tasks (#904)

Startup retention manager for asynchronous tasks. Handle gracefully
exceptions in these tasks or the configuration for them.

Remove tasks.py as repeated tasks are now handled by the retention
manager.

When running on GitHub, only the version date file is checked. The
development tag is merely a label, so any date set during development suffices.

The test_doc is also skipped on GitHub actions.

openapi.json

@@ -8,7 +8,7 @@
       "name": "Apache 2.0",
       "url": "https://www.apache.org/licenses/LICENSE-2.0.html"
     },
-    "version": "v0.2.0.dev2602241754328029"
+    "version": "v0.2.0.dev2602242106748274"
   },
   "paths": {
     "/v1/admin/cache/clear": {
@@ -4451,7 +4451,7 @@
             "type": "string",
             "title": "Version",
             "description": "Configuration file version. Used to check compatibility.",
-            "default": "0.2.0.dev2602241754328029"
+            "default": "0.2.0.dev2602242106748274"
           },
           "data_folder_path": {
             "type": "string",
@@ -4514,7 +4514,7 @@
             "type": "string",
             "title": "Version",
             "description": "Configuration file version. Used to check compatibility.",
-            "default": "0.2.0.dev2602241754328029"
+            "default": "0.2.0.dev2602242106748274"
           },
           "data_folder_path": {
             "type": "string",