fix(copy): address PR #93 review — content fixes

Warnings fixed:
- Delete orphaned overheard.yaml (Hoshe)
- Remove validate-ron line 60 spurious single-slash regex (Hoshe+Paula)
- Replace "the car" with "the departure point" in diplomatic_elite (Miri)
- Soften dock worker accusation in ovh_ifr_003 (Miri)
- Fix relationship_context Colleague→Superior in ovh_hos_002 (Miri)

Suggestions applied:
- Fix CHANGELOG count 15→16 conversations
- Update review doc status to "all issues resolved"
- Add economic/density comment to 5 files missing it
- Fix military_garrison Social→OffDuty context on mess table primitive
- Rewrite residential_station trait-description as observable behavior
- Add gatebuilder ruin note to archaeological_site header

Follow-up tickets: #695, #696, #697

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

tooling/validate-ron

@@ -57,7 +57,6 @@ def extract_names_from_block(text, field):
     block = m.group(1)
     # Strip line comments before extracting quoted strings
     block = re.sub(r'//[^\n]*', '', block)
-    block = re.sub(r'/[^\n]*', '', block)  # single-slash RON comments
     return re.findall(r'"([^"]+)"', block)
 
 # culture_id -> set of names (given + family, tracked separately for reporting)