refactor ai serving modules and crates

apps/aether-gateway/src/ai_serving/adaptation/mod.rs

@@ -0,0 +1,21 @@
+pub(crate) mod private_envelope;
+
+pub(crate) mod kiro {
+    pub(crate) use crate::ai_serving::pure::KiroToClaudeCliStreamState;
+}
+
+pub(crate) use crate::ai_serving::{
+    provider_adaptation_allows_sync_finalize_envelope, provider_adaptation_anchor_api_format,
+    provider_adaptation_descriptor_for_envelope, provider_adaptation_descriptor_for_provider_type,
+    provider_adaptation_requires_eventstream_accept,
+    provider_adaptation_should_unwrap_stream_envelope, ANTIGRAVITY_V1INTERNAL_ENVELOPE_NAME,
+    GEMINI_CLI_V1INTERNAL_ENVELOPE_NAME,
+};
+pub(crate) use kiro::KiroToClaudeCliStreamState;
+pub(crate) use private_envelope::{
+    maybe_build_provider_private_stream_normalizer,
+    maybe_normalize_provider_private_sync_report_payload,
+    normalize_provider_private_report_context, normalize_provider_private_response_value,
+    provider_private_response_allows_sync_finalize, transform_provider_private_stream_line,
+    ProviderPrivateStreamNormalizer,
+};