Remote call trigger support (#105)

* add support of remote task tracking
* add remote call trigger implementation
* docs update
* add cross-service upload
* add notes about user
* add more ability to control upload
* multipart upload with signatures as well as safe file save
* configuration reference update
* rename watcher methods
* erase logs based on current package version

Old implementation has used process id instead, but it leads to log
removal in case of remote process trigger

* add --server flag for setup command
* restore behavior of the httploghandler

tests/ahriman/core/report/conftest.py

@@ -0,0 +1,20 @@
+import pytest
+
+from ahriman.core.configuration import Configuration
+from ahriman.core.report.remote_call import RemoteCall
+
+
+@pytest.fixture
+def remote_call(configuration: Configuration) -> RemoteCall:
+    """
+    fixture for remote update trigger
+
+    Args:
+        configuration(Configuration): configuration fixture
+
+    Returns:
+        RemoteCall: remote update trigger test instance
+    """
+    configuration.set_option("web", "host", "localhost")
+    configuration.set_option("web", "port", "8080")
+    return RemoteCall("x86_64", configuration, "remote-call")