data(content): address PR #146 review — Ghawr rename, faction pins, catalog

Review fixes for the #1019 heritage rebalance:

- Marib's farm world Ghouta -> Ghawr (Miri): "Ghouta" carries strong
  modern associations (2013 Damascus attack); Ghawr (the Jordan Rift
  Valley, an irrigated lowland farming region) keeps the water-fed-
  drylands sense without the resonance.
- Add dominant_faction = "independent" to GJ 914A / 508A / 1245B (Hoshe)
  — all five rebalanced systems are self-governing independent
  communities; uniform with siblings GJ 722 / 680 and clears V-FAC-01.
- catalog.md: fill GJ 914A -> Marib and GJ 722 -> Sığınak (Hoshe) — the
  two anchor systems still showed em-dash placeholders.
- Marib gttr: name the second aperture neighbour Sığınak instead of the
  bare "GJ 722" (Miri).

Pre-existing Golestan aperture/spur wording (reviewers split on whether
it is even wrong) is left for a separate content pass — not introduced
by this rename.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/workshops/system-economic-specialization/heritage-rebalance-batch.md

@@ -52,7 +52,7 @@ D-167 worldbuilding; keeps their cross-references internally consistent).
 
 ### GJ 914A — Droëland → Marib (arab)
 - `star_systems.proper_name`: Droëland → **Marib**
-- `bodies.GJ914Ac.proper_name`: Calvinia → **Ghouta**
+- `bodies.GJ914Ac.proper_name`: Calvinia → **Ghawr**
 - `stations.GJ914A-oort-S1.proper_name`: "Droëland Horizon" → **"Marib Horizon"**
 - `system_specialization.toml [GJ 914A]`: economic stays NULL (heuristic); **add `cultural_specialization = "arab"`**; faction stays NULL
 - atlas JSON `docs/atlas/proposals/GJ914A.json` (if present): proper_name → Marib