satisfactory: exponential-notation fix and NOTES.txt (6.1.0+upv1.9.10)

Teil von #157 und Teil von #43.

#157: multiplyQuantity turned a bare byte count into exponential notation.
The null-safe fallback helpers pass values through fromYaml, which parses
every number as float64, and Go's "%v" switches float64 to exponential
notation from about 1e6 upwards. A request of 1048576 became
"1.048576e+06" and the render aborted on the suffix check.

Both printf "%v" sites are replaced by the canonical satisfactory.formatNumber
helper: the input of multiplyQuantity and the output of a non-integer product.
The second one never reached the suffix check, so it did not abort - it
rendered a silently invalid quantity that only the API server would reject.

#43: adds templates/NOTES.txt. The chart has no Ingress and no secrets, so
the notes cover what an operator would otherwise read out of the templates:
the NodePort a player actually dials and the pinned-port collision between
two releases, the 20-minute Steam download budget and that SKIPUPDATE is
false on every start, what a green pod does and does not prove (no probe
ever touches the UDP game port), that saves and game files share one PVC on
a hardcoded longhorn class which helm uninstall deletes, the emptyDirs
counting against the ephemeral-storage limit, the deliberate limitFactor 2
and fsGroupChangePolicy OnRootMismatch, and that game.seasonalEvents is
passed through to DISABLESEASONALEVENTS uninverted.

No rendered Kubernetes object changes, so the bump is minor; appVersion
stays v1.9.10.

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