Docs: fix 2 dead-symbol leftovers found by verification round

- CycleDirectorSpawnSystem: drop the dangling <see cref="CyclePhase.ExpeditionTicks"/> (deleted const in B2) -> plain 'initial phase delay'.
- BuildSendSystem: remove the stale '(Conveyor uses s_ConveyorDir for facing)' comment (field + hotkey deleted in B2).

Comment-only; 459/459 EditMode tests pass. Adversarial verification round (2 agents over the full diff) found no behavior regressions and no false-confidence tests.

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

Assets/_Project/Scripts/Server/World/CycleDirectorSpawnSystem.cs

@@ -12,7 +12,7 @@ namespace ProjectM.Server
     /// but MINUS the RegionTag — the director must stay global so GhostRelevancy keeps it relevant to every
     /// region). On its first update it reads the baked <see cref="CycleDirectorSpawner"/> + NetworkTime,
     /// instantiates the ghost, initializes <see cref="CycleState"/> (Expedition, cycle 1, PhaseEndTick =
-    /// now + <see cref="CyclePhase.ExpeditionTicks"/>), adds the server-only <see cref="CycleRuntime"/>, and
+    /// now + the initial phase delay), adds the server-only <see cref="CycleRuntime"/>, and
     /// places it at the base center (preserving the prefab's baked LocalTransform scale — FromPosition would
     /// reset the replicated Scale GhostField), then destroys the spawner so it idles.
     /// </summary>