fix(ci): build --wheel directly; sdist-via-cross-dir doesn't resolve in CI

adk/'s wheel uses hatchling force-include to pull ../src/agentex/lib into
agentex/lib. `rye build` defaults to sdist-then-wheel-from-sdist, and when
building the wheel from the sdist, the relative path ../src/agentex/lib
resolves against the unpacked sdist dir (which doesn't have lib). Result:
FileNotFoundError: Forced include not found.

Building --wheel directly skips the sdist intermediate and resolves the
force-include path against the working tree, which works.

Sdist support for adk/ is deferred — it requires either physically copying
lib/ into the sdist tarball, or telling hatchling sdist to also pull lib
via force-include. Not needed for the wheel-based publishing flow.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: max-parke-scale

.github/workflows/ci.yml

@@ -60,10 +60,16 @@ jobs:
         run: ./scripts/bootstrap
 
       - name: Run build (slim agentex-sdk-client)
-        run: rye build
+        # --wheel only: avoid the sdist intermediate step, which would
+        # otherwise force the heavy build below to resolve cross-directory
+        # paths from inside a sdist tarball.
+        run: rye build --wheel
 
       - name: Run build (ADK overlay agentex-sdk)
-        run: (cd adk && rye build)
+        # Heavy wheel uses hatchling force-include to pull
+        # ../src/agentex/lib into agentex/lib. Building --wheel directly
+        # (vs sdist-then-wheel) keeps the relative path resolvable.
+        run: (cd adk && rye build --wheel)
 
       - name: Get GitHub OIDC Token
         if: |-