docs(wrapper): RRMModel docstring references wrong attribute names

[MAfarrag]

Context

PR #149 converted docstrings to Google-style but carried over stale
attribute names from an older version of the codebase.

Problem / Current Behaviour

`Wrapper.RRMModel` docstring lists Model attributes `sp_prec`,
`sp_et`, `sp_temp`, `sp_par`, `p2`, `kub`, `klb` — none of
which exist on `Catchment`. The actual attribute names are `Prec`,
`ET`, `Temp`, `Parameters`, `conversion_factor`, etc.

Affected locations

File	Symbol	Notes
`src/Hapi/wrapper.py:58-88`	`Wrapper.RRMModel`	Wrong attr names
`src/Hapi/wrapper.py:94-120`	`Wrapper.RRMWithlake`	May also be stale

Proposed Solution

Update the docstring attribute lists to match `Catchment.init`
attribute names: `Prec`, `ET`, `Temp`, `Parameters`,
`FlowAccArr`, `FlowDirArr`, `LumpedModel`, `InitialCond`,
`q_init`, `Snow`, `CatArea`, `conversion_factor`, etc.

Effort Estimate

Size: `XS`

Definition of Done

• All attribute references in wrapper docstrings match actual
  `Catchment` attribute names
• mkdocs build produces no new warnings

[MAfarrag]

Closed: created in error. These are follow-up items from PR #152 review, not standalone issues.