culture(schleswig_holstein): add ## Title section to SH culture files

Follow-up to satisfy khai-tests v0.1.19's component contract: every
khai file must carry a ## Title chapter. The four SH content files
that don't already have one (position_language, piece_doppeleiche,
place_kiel, process_deichgraf) now do.

Each insertion is a two-line addition right after the existing
level-1 heading:

  # Place: Kiel

+ ## Title
+ Kiel
+
  ## Owner

The existing `# <Kind>: <Name>` heading is preserved -- the engine
convention stands; the new chapter just satisfies the structural test.

Personas already have ## Title (with their role as subtitle), so
they pass without change. The SH position file (culture_german_sh_position.md)
also already passes -- only the language / piece / place / process
needed the new chapter.

Verified locally:
  pytest --pyargs khai_tests.components.test_khai_{position,piece,place,process}
    --khai-files="regions/europe/germany/schleswig_holstein/*.md"
    -> passes (was: 4 failed across the four kinds)

https://claude.ai/code/session_01PaUEPspVUzy36LUZ4t1yEU

Author: claude

regions/europe/germany/schleswig_holstein/culture_german_sh_piece_doppeleiche.md

@@ -9,6 +9,9 @@ stamp:
 ---
 # Piece: Doppeleiche
 
+## Title
+Doppeleiche
+
 ## Owner
 - Project: Cultures
 - Culture: Schleswig-Holstein

regions/europe/germany/schleswig_holstein/culture_german_sh_place_kiel.md

@@ -9,6 +9,9 @@ stamp:
 ---
 # Place: Kiel
 
+## Title
+Kiel
+
 ## Owner
 - Project: Cultures
 - Culture: Schleswig-Holstein

regions/europe/germany/schleswig_holstein/culture_german_sh_position_language.md

@@ -9,6 +9,9 @@ stamp:
 ---
 # Language: SH-Hochdeutsch
 
+## Title
+SH-Hochdeutsch
+
 ## Owner
 - Project: Cultures
 - Culture: Schleswig-Holstein

regions/europe/germany/schleswig_holstein/culture_german_sh_process_deichgraf.md

@@ -9,6 +9,9 @@ stamp:
 ---
 # Process: Deichgraf
 
+## Title
+Deichgraf
+
 ## Owner
 - Project: Cultures
 - Culture: Schleswig-Holstein