fix(test): resolve self-exclusion bug in environment orchestrator

The self-exclusion check compared BASH_SOURCE[0] (relative path when
invoked as `bash ./scripts/…/00_orchestrator.sh`) against the glob-built
step paths (always absolute). The mismatch caused the orchestrator to
include itself in the loop, running a full inner pass of steps 01–10
before the outer loop repeated them — doubling the total runtime.

Fix: resolve SELF to an absolute path using SCRIPT_DIR so the comparison
is always path-equivalent regardless of invocation style.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/tests/environment/00_orchestrator.sh

@@ -8,6 +8,9 @@ unset GITHUB_ACTIONS
 unset ACT
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# Resolve to an absolute path so the self-exclusion works regardless of whether
+# the script was invoked with a relative path (e.g. bash ./scripts/…/00_orchestrator.sh).
+SELF="${SCRIPT_DIR}/$(basename "${BASH_SOURCE[0]}")"
 # shellcheck source=scripts/tests/environment/lib.sh
 source "${SCRIPT_DIR}/lib.sh"
 
@@ -15,7 +18,7 @@ source "${SCRIPT_DIR}/lib.sh"
 cd "${REPO_ROOT}"
 
 for step in "${SCRIPT_DIR}"/[0-9][0-9]_*.sh; do
-	[[ "${step}" == "${BASH_SOURCE[0]}" ]] && continue
+	[[ "${step}" == "${SELF}" ]] && continue
 	load_repo_env
 	ensure_git_safe_directory
 	echo "============================================================"