Rename "channel" to "conversation" within the server.

I've split this from the schema and API changes because, frankly, it's huge. Annoyingly so. There are no semantic changes in this, it's all symbol changes, but there are a _lot_ of them because the term "channel" leaks all over everything in a service whose primary role is managing messages sent to channels (now, conversations).

I found a buggy test while working on this! It's not fixed in this commit, because it felt mean to hide a real change in the middle of this much chaff.

1 files changed, 38 insertions, 0 deletions

diff --git a/src/conversation/id.rs b/src/conversation/id.rs
new file mode 100644
index 0000000..5f37a59
--- /dev/null
+++ b/src/conversation/id.rs
@@ -0,0 +1,38 @@
+use std::fmt;
+
+use crate::id::Id as BaseId;
+
+// Stable identifier for a [Conversation]. Prefixed with `C`.
+#[derive(
+    Clone,
+    Debug,
+    Eq,
+    Hash,
+    Ord,
+    PartialEq,
+    PartialOrd,
+    sqlx::Type,
+    serde::Deserialize,
+    serde::Serialize,
+)]
+#[sqlx(transparent)]
+#[serde(transparent)]
+pub struct Id(BaseId);
+
+impl From<BaseId> for Id {
+    fn from(id: BaseId) -> Self {
+        Self(id)
+    }
+}
+
+impl Id {
+    pub fn generate() -> Self {
+        BaseId::generate("C")
+    }
+}
+
+impl fmt::Display for Id {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        self.0.fmt(f)
+    }
+}