cyberchef: format quantities without exponential notation (9.0.1+up11.4.0)

multiplyQuantity turned its input into a string with printf "%v". The null-safe fallback helpers from #99 route values through fromYaml, which parses every number as float64, and Go switches float64 to exponential notation from about 1e6 upwards. A bare byte count like 1048576 became "1.048576e+06" and the suffix check aborted the render.

The non-integer product used the same printf "%v" on output. That path never reaches the suffix check, so it rendered an invalid quantity silently, which only the API server rejects on apply. cyberchef types limitFactor as "number", so a fractional factor is allowed by the schema and that path is reachable with ordinary values.

Both call sites now go through a new formatNumber helper that forces decimal notation and trims the padding zeros; strings such as "512Mi" pass through untouched. Round-trip and resources helper are unchanged. The wording matches the canonical fix already merged for template-chart and the other charts, so the shared copy stays free of drift.

cyberchef/templates/_helpers.tpl

@@ -67,7 +67,7 @@ Handles plain numbers ("2", "0.5", 1073741824), decimal ("1.5Gi"), binary
 results are printed without a decimal point.
 */}}
 {{- define "cyberchef.multiplyQuantity" -}}
-{{- $quantity := printf "%v" .quantity -}}
+{{- $quantity := include "cyberchef.formatNumber" .quantity -}}
 {{- $number := regexFind "^[0-9]+(\\.[0-9]+)?" $quantity -}}
 {{- if not $number -}}
 {{- fail (printf "cannot parse resource quantity %q" $quantity) -}}
@@ -80,7 +80,24 @@ results are printed without a decimal point.
 {{- if eq $product (floor $product) -}}
 {{- printf "%d%s" (int64 $product) $suffix -}}
 {{- else -}}
-{{- printf "%v%s" $product $suffix -}}
+{{- printf "%s%s" (include "cyberchef.formatNumber" $product) $suffix -}}
+{{- end -}}
+{{- end -}}
+
+{{/*
+Render a number as a plain decimal string, never in exponential notation.
+
+Why this exists (issue #157): the null-safe fallback helpers pass values
+through fromYaml, which parses every number as float64. Go's "%v" switches
+float64 to exponential notation from about 1e6 upwards, so a bare byte count
+like 1048576 became "1.048576e+06" - not a valid Kubernetes quantity, and the
+render aborted. Strings ("512Mi") are passed through untouched.
+*/}}
+{{- define "cyberchef.formatNumber" -}}
+{{- if kindIs "float64" . -}}
+{{- regexReplaceAll "\\.?0+$" (printf "%.10f" .) "" -}}
+{{- else -}}
+{{- printf "%v" . -}}
 {{- end -}}
 {{- end -}}