fix(scripts): fix tfvars parsing on macOS BSD sed

Replace \s with POSIX [[:space:]] in sed expression for compartment_id
extraction. BSD sed doesn't support \s, causing the regex to silently
fail and pass the raw line instead of the OCID value.

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

Author: ericfitz

scripts/build-container-oracle.sh

@@ -187,7 +187,7 @@ if [[ -z "$REPO_OCID" ]]; then
     COMPARTMENT_ID=""
     TFVARS_FILE="${PROJECT_ROOT}/terraform/environments/oci-production/terraform.tfvars"
     if [[ -f "$TFVARS_FILE" ]]; then
-        COMPARTMENT_ID=$(grep -E '^compartment_id\s*=' "$TFVARS_FILE" | sed 's/.*=\s*"//' | sed 's/".*//' || true)
+        COMPARTMENT_ID=$(grep -E '^compartment_id\s*=' "$TFVARS_FILE" | sed 's/.*=[[:space:]]*"//' | sed 's/".*//' || true)
         if [[ -n "$COMPARTMENT_ID" ]]; then
             log_info "Found compartment_id in terraform.tfvars"
         fi