docs: wrap long line in mod_puls_routing example to fix Rd line-width…

[danmcgraw94]

Summary

Closes #3.

During investigation of Issue #3, three of the four reported items were found to be environmental on the reviewer's side (stale installed package) rather than actual code bugs:

• rfaR / peakStages — no reference to peakStages in current package code
• scale_hydrograph() — example already uses JMD data, runs cleanly under example()
• mod_puls_routing() — example is self-contained, runs cleanly under example()
• rfaR-Realization-Conceptual.Rmd vignette — builds cleanly under devtools::build_vignettes()

The one real issue was an R CMD check NOTE on mod_puls_routing.Rd flagging a line over 100 characters in the \examples block.

Changes

Wrapped the long line in mod_puls_routing()'s @examples block to stay under 100 characters.

Testing

• R CMD check now reports 0 errors, 0 warnings, 0 notes
• example("mod_puls_routing") runs cleanly end-to-end