Add Gitea release page transport

docs/internal/overview.md

@@ -16,6 +16,8 @@ Implemented internal packages:
   overlays.
 - `internal/build` compiles explicit Go targets with shared version injection,
   verifies native version output, and returns generated file digests.
+- `internal/gitea` verifies hosted source tags and finds or creates matching
+  stable release pages through the Gitea REST API.
 - `internal/candidate` captures and validates one clean local candidate, checks
   its committed release note and local tag state, runs validation once, and
   rechecks mutable repository state.
@@ -30,5 +32,7 @@ Implemented internal packages:
 
 The executable controller uses the runtime facade and the command-owned CLI
 adapter. The adapter uses the process runner and imports neither public facade.
-The publication operation coordinates the candidate and Git packages. Build
-and Gitea implementation packages will be added as those responsibilities land.
+The publication operation coordinates the candidate and Git packages. The
+internal Gitea client is documented in the
+[Gitea integration guide](../integrations/gitea.md); delivery orchestration will
+use it when that facade and CLI work lands.