feat: SSE support (#162)

* event bus implementation

* update tests

* docs update

* review fixes

* update configs

* fix typo

* frontend changes

* install missing pacakge

* queue processing simplification

package/archlinux/PKGBUILD

@@ -77,7 +77,7 @@ package_ahriman-triggers() {
 package_ahriman-web() {
     pkgname='ahriman-web'
     pkgdesc="ArcH linux ReposItory MANager, web server"
-    depends=("$pkgbase-core=$pkgver" 'python-aiohttp-cors' 'python-aiohttp-jinja2')
+    depends=("$pkgbase-core=$pkgver" 'python-aiohttp-cors' 'python-aiohttp-jinja2' 'python-aiohttp-sse-git')
     optdepends=('python-aioauth-client: OAuth2 authorization support'
                 'python-aiohttp-apispec>=3.0.0: autogenerated API documentation'
                 'python-aiohttp-openmetrics: HTTP metrics support'

package/share/ahriman/settings/ahriman.ini.d/00-web.ini

@@ -46,6 +46,8 @@ host = 127.0.0.1
 ;index_url =
 ; Max file size in bytes which can be uploaded to the server. Requires ${web:enable_archive_upload} to be enabled.
 ;max_body_size =
+; Max event queue size used for server sent event endpoints (0 is infinite)
+;max_queue_size = 0
 ; Port to listen. Must be set, if the web service is enabled.
 ;port =
 ; Disable status (e.g. package status, logs, etc) endpoints. Useful for build only modes.