HYPERFLEET-1017 - fix: restore aliases.tsp symlink to version control

The aliases.tsp symlink must be tracked in git pointing to
aliases-core.tsp by default. Reverts .gitignore change that was
removing it. Updates CLAUDE.md to document this convention.

Author: rafabene

.gitignore

@@ -1,6 +1,3 @@
 node_modules/
 tsp-output/
-tsp-output-*/
-
-# Build artifact — build-schema.sh re-creates this symlink for each provider variant
-aliases.tsp
+tsp-output-*/

CLAUDE.md

@@ -35,7 +35,7 @@ alias ClusterSpec = Record<unknown>;  // Generic
 alias ClusterSpec = GCPClusterSpec;   // Provider-specific
 ```
 
-The `aliases.tsp` symlink determines which provider types are active. The `build-schema.sh` script automatically re-links this during builds.
+The `aliases.tsp` symlink determines which provider types are active. The `build-schema.sh` script automatically re-links this during builds. The symlink is tracked in git and should always point to `aliases-core.tsp` by default. Do not remove it from version control or add it to `.gitignore`.
 
 **When adding new models:**
 - Shared models → `models/`

aliases.tsp

@@ -0,0 +1 @@
+aliases-gcp.tsp