Consolidate most repository types into a repo module.

Having them contained in the individual endpoint groups conveyed an unintended sense that their intended scope was _only_ that endpoint group. It also made most repo-related import paths _quite_ long. This splits up the repos as follows:

* "General applicability" repos - those that are only loosely connected to a single task, and are likely to be shared between tasks - go in crate::repo.

* Specialized repos - those tightly connected to a specific task - go in the module for that task, under crate::PATH::repo.

In both cases, each repo goes in its own submodule, to make it easier to use the module name as a namespace.

Which category a repo goes in is a judgment call. `crate::channel::repo::broadcast` (formerly `channel::repo::messages`) is used outside of `crate::channel`, for example, but its main purpose is to support channel message broadcasts. It could arguably live under `crate::event::repo::channel`, but the resulting namespace is less legible to me.

1 files changed, 44 insertions, 0 deletions

diff --git a/.sqlx/query-f29a6accbc6b4cca6a3b5702d475d33061ffc50b6bd65ac9a950ad6d715ba0bc.json b/.sqlx/query-f29a6accbc6b4cca6a3b5702d475d33061ffc50b6bd65ac9a950ad6d715ba0bc.json
new file mode 100644
index 0000000..e2b6d74
--- /dev/null
+++ b/.sqlx/query-f29a6accbc6b4cca6a3b5702d475d33061ffc50b6bd65ac9a950ad6d715ba0bc.json
@@ -0,0 +1,44 @@
+{
+  "db_name": "SQLite",
+  "query": "\n\t\t\t\tselect\n\t\t\t\t\tmessage.id as \"id: message::Id\",\n\t\t\t\t\tlogin.id as \"sender_id: login::Id\",\n\t\t\t\t\tlogin.name as sender_name,\n\t\t\t\t\tmessage.body,\n\t\t\t\t\tmessage.sent_at as \"sent_at: DateTime\"\n\t\t\t\tfrom message\n\t\t\t\t\tjoin login on message.sender = login.id\n\t\t\t\twhere channel = $1\n\t\t\t\t\tand coalesce(sent_at > $2, true)\n\t\t\t\torder by sent_at asc\n\t\t\t",
+  "describe": {
+    "columns": [
+      {
+        "name": "id: message::Id",
+        "ordinal": 0,
+        "type_info": "Text"
+      },
+      {
+        "name": "sender_id: login::Id",
+        "ordinal": 1,
+        "type_info": "Text"
+      },
+      {
+        "name": "sender_name",
+        "ordinal": 2,
+        "type_info": "Text"
+      },
+      {
+        "name": "body",
+        "ordinal": 3,
+        "type_info": "Text"
+      },
+      {
+        "name": "sent_at: DateTime",
+        "ordinal": 4,
+        "type_info": "Text"
+      }
+    ],
+    "parameters": {
+      "Right": 2
+    },
+    "nullable": [
+      false,
+      false,
+      false,
+      false,
+      false
+    ]
+  },
+  "hash": "f29a6accbc6b4cca6a3b5702d475d33061ffc50b6bd65ac9a950ad6d715ba0bc"
+}