Add mean/median deposited energy and step length plots per event

Move ipykernel into the analysis extra instead of a separate
dependency group, since it's needed wherever analysis plotting runs.

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

uv.lock

@@ -446,6 +446,7 @@ dependencies = [
 
 [package.optional-dependencies]
 analysis = [
+    { name = "ipykernel" },
     { name = "matplotlib" },
     { name = "polars" },
 ]
@@ -467,14 +468,10 @@ dev = [
     { name = "ty" },
 ]
 
-[package.dev-dependencies]
-analysis = [
-    { name = "ipykernel" },
-]
-
 [package.metadata]
 requires-dist = [
     { name = "awkward", marker = "extra == 'convert'", specifier = ">=2.6,<3" },
+    { name = "ipykernel", marker = "extra == 'analysis'", specifier = ">=7.3.0" },
     { name = "matplotlib", marker = "extra == 'analysis'", specifier = ">=3.8,<4" },
     { name = "numpy", specifier = ">=1.26,<3" },
     { name = "pandas", specifier = ">=2.2,<4" },
@@ -492,9 +489,6 @@ requires-dist = [
 ]
 provides-extras = ["cpu", "cuda", "dev", "convert", "analysis"]
 
-[package.metadata.requires-dev]
-analysis = [{ name = "ipykernel", specifier = ">=7.3.0" }]
-
 [[package]]
 name = "iniconfig"
 version = "2.3.0"