Gate JSDoc completeness on every package export

New doc-sync gate verify-export-jsdoc walks every module-level exported
name under packages/*/*/src and requires description prose everywhere,
plus @param per parameter and @returns on non-void annotated returns for
function-like exports, public class methods, properties, and accessors.
The parsing + check helpers move out of gen-cordis-catalog.ts into a
shared scripts/jsdoc.ts so 'documented' means one thing on both gated
surfaces.

Deliberate exemptions (documented in the RFC): heritage-declared class
members (the seam declaration is the doc's one home — the one checker
query in an otherwise pure-AST walk), cordis plugin-protocol slots
(name/inject/reusable/Config/apply, top-level and static), constructors,
overload implementations, declare-module augmentation bodies, and
re-export statements (checked at the defining module).

The 203 under-documented exports the gate found at adoption are filled
in this change, so the gate lands green; generated catalogs/graphs are
regenerated for the shifted line pointers.

RFC: docs/rfc/implemented/process/2026-07-06-export-surface-jsdoc-gate.md

packages/hooks/hook-protocol/src/merge.ts

@@ -71,6 +71,8 @@ function decisionForRank(maxRank: number): MergedDecision {
  * into one {@link MergedHookOutcome} by the precedence rules above. An empty list
  * yields a neutral outcome (`decision: 'none'`, no stop, empty context) — the
  * caller treats that as "no hook had anything to say".
+ * @param outputs - every matched hook's decoded output, in hook order.
+ * @returns the single folded outcome the bridge maps onto its seam.
  */
 export function mergeHookOutputs(outputs: HookOutput[]): MergedHookOutcome {
   let maxRank = 0