lighting: dynamic-only lights so no lighting build is required

The editor warned 'LIGHTING NEEDS TO BE REBUILT' (Build Lighting Only /
BuildLighting) because the sun and sky were Stationary with no baked lightmap.
The demo is a fixed daytime scene lit entirely dynamically, so:

- Config/DefaultEngine.ini: r.AllowStaticLighting=False - nothing to build.
- DemoMap + ReviewMap builders: sun, sky light, height fog and the staged
  mesh components are set to ComponentMobility.MOVABLE.

Also clears the Android File Server SecurityToken in DefaultEngine.ini: the
plugin is disabled and excluded from shipping, and the value is a credential
that must not be committed.

All 14 screenshots re-rendered; no lighting warnings in the build or run logs.

Game/GigLine/Config/DefaultEngine.ini

@@ -2,7 +2,12 @@
 GlobalDefaultGameMode="/Script/GigLine.GigLineGameModeBase"
 
 [/Script/Engine.RendererSettings]
-; Leave defaults for 0.1.0; quality preset is documented at release time.
+; Dynamic-only lighting. With static lighting allowed, the stationary sun and
+; sky light demanded a baked lighting build and the editor warned
+; "LIGHTING NEEDS TO BE REBUILT" (Build Lighting Only / BuildLighting) on every
+; map. The demo is a fixed daytime scene lit entirely dynamically, so disable
+; static lighting outright — nothing to build, no warning.
+r.AllowStaticLighting=False
 
 [URL]
 GameName=GigLine
@@ -10,7 +15,9 @@ GameName=GigLine
 [/Script/AndroidFileServerEditor.AndroidFileServerRuntimeSettings]
 bEnablePlugin=False
 bAllowNetworkConnection=False
-SecurityToken=01A1B5CDAFDE7AAEB5DFBB48880D25DE
+; SecurityToken intentionally empty: it is a credential, and the plugin is
+; disabled and excluded from shipping. Never commit a real token here.
+SecurityToken=
 bIncludeInShipping=False
 bAllowExternalStartInShipping=False
 bCompileAFSProject=False