gotenberg: render large byte counts without exponential notation (8.0.1+up8.36.0)

The null-safe fallback helpers from #99 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 turned into
"1.048576e+06" - not a valid Kubernetes quantity. multiplyQuantity then aborted
the render on its own suffix check. The second "%v", the one printing a
non-integer product, never reaches that check and rendered an invalid quantity
silently; only the API server rejects it on apply.

Both call sites now go through a new formatNumber helper that forces plain
decimal notation and passes strings ("512Mi") through untouched. The
fromYaml/toYaml round-trip is not touched: it was just unified across all
charts and it is not the cause.

gotenberg reaches multiplyQuantity from two places - the Deployment's
resources block and NOTES.txt, which reports the effective limits. With the
chart's default values both non-CPU resources carry an explicit limit, so no
limit is computed and neither site was affected in the default configuration.

Teil von #157

gotenberg/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 "gotenberg.multiplyQuantity" -}}
-{{- $quantity := printf "%v" .quantity -}}
+{{- $quantity := include "gotenberg.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 "gotenberg.formatNumber" $product) $suffix -}}
+{{- end -}}
+{{- end -}}
+
+{{/*
+Render a number as a plain decimal string, never in exponential notation.
+
+Why this exists (issue #157): the null-safe fallback helpers pass values
+through fromYaml, which parses every number as float64. Go's "%v" switches
+float64 to exponential notation from about 1e6 upwards, so a bare byte count
+like 1048576 became "1.048576e+06" - not a valid Kubernetes quantity, and the
+render aborted. Strings ("512Mi") are passed through untouched.
+*/}}
+{{- define "gotenberg.formatNumber" -}}
+{{- if kindIs "float64" . -}}
+{{- regexReplaceAll "\\.?0+$" (printf "%.10f" .) "" -}}
+{{- else -}}
+{{- printf "%v" . -}}
 {{- end -}}
 {{- end -}}