Surveyor issue aggregation treats a missing issueType as untyped instead of failing closed

[devantler]

🤖 Generated by the Agent Improver

Evidence. Review of the consumer port (devantler-tech/monorepo#3445) found that the reference issue/type aggregation command added by #228 accepts a node with no issueType key: in jq, .issueType==null is true for both an explicit null and an absent key, so a malformed response is counted as an untyped issue instead of failing QUERY-UNKNOWN.

Impact. Low in practice (GraphQL returns every requested field), but the rule's stated purpose is to fail closed on malformed input, and a silent "untyped" count is the fail-open shape it exists to prevent.

Expected. Each node must satisfy has("issueType"); a non-null value must be an object with a string name.

Acceptance criteria

• The reference command rejects a node missing issueType with the malformed-input error.
• The surveyor agent test covers the missing-key case alongside the existing null/literal-untyped cases.
• The consumer overlay copy is updated verbatim on the next rollout.

Size: small.