v2.2 task 01: put Route() in a new config/route.go (config.go is at the line limit); note

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/plans/v2.2/01-route-templates.md

@@ -17,9 +17,14 @@ instances never share a lease and each has its own usage row.
 - Copy: `internal/config/config_v22_test.go` (its `TestWakeBroadcasts` belongs to task 02 and
   will fail to compile until then — see step 2), `internal/proxy/template_test.go`,
   `internal/admin/admin_template_test.go`
-- Modify: `internal/config/config.go`, `internal/proxy/proxy.go`, `internal/admin/admin.go`,
-  `internal/admin/admin_ops.go`, `cmd/crossbar/main.go` (the identity middleware's route→peers
-  lookup), `docs/implementer-log.md`
+- Create: `internal/config/route.go` — the template name pattern and `Route()` live here;
+  `config.go` is already at the 400-line limit, so add nothing to it beyond what the new file
+  needs from it (one-line hooks are fine)
+- Modify: `internal/config/config.go` (minimal), `internal/proxy/proxy.go`,
+  `internal/admin/admin.go`, `internal/admin/admin_ops.go`, `cmd/crossbar/main.go` (the identity
+  middleware's route→peers lookup), `docs/implementer-log.md`. If `proxy.go` would pass 400
+  lines, move route resolution (`route`, `SplitRoute`, `allowedPath`) into a new
+  `internal/proxy/route.go`.
 
 ## Interfaces
 
@@ -56,7 +61,7 @@ Rules:
   `go test -race -count=1 ./internal/proxy/ ./internal/admin/` for the behaviour, and `go vet
   ./internal/config/` will fail only on the missing `Addresses` method until task 02: that is
   expected and is the one allowed red at the end of this task. Say so in the log row.
-- [ ] **3.** `config.go`: the template regex, `Route()`. **4.** `proxy.go` route resolution.
+- [ ] **3.** `config/route.go`: the template pattern, `Route()`; the validation in `config.go` accepts template names. **4.** `proxy.go` route resolution.
   **5.** `admin.go` / `admin_ops.go`. **6.** `main.go`.
 - [ ] **7.** `gofmt -w`; `go test -race -count=1 ./internal/proxy/ ./internal/admin/ ./internal/health/ ./internal/wake/` → `ok`.
 - [ ] **8.** Row `v2.2/01-route-templates`; commit (the gate runs green after task 02).
@@ -75,4 +80,3 @@ git commit
 ## Stop and report if
 
 - Passing needs a change to any earlier given test.
-- The 400-line limit forces `proxy.go` apart: say which split you propose before doing it.