Rename the project to Echo (was fedserv)

Rebrand the daemon and workspace: the binary is now `echo`, every crate
is `echo-*` (`echo-api` and the module crates), Rust imports use
`echo_*`, the gRPC proto is `proto/echo.proto` with package `echo.v1`,
and the log filter, gossip peer-name default, and on-disk store default
(`echo.db.jsonl`) follow. Docs updated throughout. No behaviour change;
crate directories and the config schema are untouched.

modules/hostserv/src/approve.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{NetView, Sender, ServiceCtx, Store};
+use echo_api::{NetView, Sender, ServiceCtx, Store};
 
 // ACTIVATE <account> / REJECT <account>: approve a pending vhost request (setting
 // and applying it) or turn it down. Operators only.

modules/hostserv/src/default.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // DEFAULT: give yourself the auto-vhost from the network template, with your
 // account name substituted for $account.

modules/hostserv/src/del.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{NetView, Sender, ServiceCtx, Store};
+use echo_api::{NetView, Sender, ServiceCtx, Store};
 
 // DEL <account>: remove an account's vhost, restoring the normal host on any
 // online sessions. Operators only.

modules/hostserv/src/forbid.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // FORBID <pattern>: block user-requested vhosts matching this regex (operators),
 // e.g. (?i)(oper|admin|staff|services) to stop impersonation.

modules/hostserv/src/lib.rs

@@ -3,7 +3,7 @@
 //! with SET/DEL and review with LIST. `lib.rs` holds the dispatcher; each
 //! command lives in its own file.
 
-use fedserv_api::{NetView, Priv, Sender, Service, ServiceCtx, Store};
+use echo_api::{NetView, Priv, Sender, Service, ServiceCtx, Store};
 
 #[path = "on.rs"]
 mod on;

modules/hostserv/src/list.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // LIST: every account with an assigned vhost. Operators only.
 pub fn handle(me: &str, from: &Sender, ctx: &mut ServiceCtx, db: &dyn Store) {

modules/hostserv/src/off.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{NetView, Sender, ServiceCtx, Store};
+use echo_api::{NetView, Sender, ServiceCtx, Store};
 
 // OFF: restore your normal host for this session (the vhost stays assigned and
 // re-applies next time you identify).

modules/hostserv/src/offer.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // OFFER <host>: add a vhost to the self-serve menu (operators).
 pub fn add(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db: &mut dyn Store) {

modules/hostserv/src/on.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // ON: activate the vhost assigned to your account.
 pub fn handle(me: &str, from: &Sender, ctx: &mut ServiceCtx, db: &dyn Store) {

modules/hostserv/src/request.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // REQUEST <host>: ask for a vhost, to be approved by an operator.
 pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db: &mut dyn Store) {

modules/hostserv/src/set.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{parse_duration, NetView, Sender, ServiceCtx, Store};
+use echo_api::{parse_duration, NetView, Sender, ServiceCtx, Store};
 
 // SET <account> <host> [duration]: assign a vhost to an account, applying it at
 // once to online sessions. An optional duration (e.g. 30d) makes it temporary.

modules/hostserv/src/take.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // TAKE <number>: assign yourself the vhost offered at that position on the menu.
 pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db: &mut dyn Store) {

modules/hostserv/src/template.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // TEMPLATE [<pattern>]: show the auto-vhost template, or (operators) set it.
 // Use $account for the requester's sanitised account name, e.g.

modules/hostserv/src/waiting.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // WAITING: pending vhost requests awaiting approval. Operators only.
 pub fn handle(me: &str, from: &Sender, ctx: &mut ServiceCtx, db: &dyn Store) {