commit_msg.txt

fix: resolve all CI build and lint failures

Fixes 3 failing CI checks (Build and Test, Validate and Build,
Lint unwrap/expect ban):

remitwise-common:
- Remove duplicate `SymbolError` enum definition (E0428)
- Fix `require_valid_symbol_length` to use `sym.into_val(env)`
- Add missing `verify_no_dust`, `MAX_TOP_N`, `require_bounded_top_n`

insurance:
- Add `Copy` derive to `InsuranceEvent` (required by #[contracttype])
- Wrap `PolicyPage` return in `Ok()` for `get_active_policies`

family_wallet:
- Add missing imports: STROOPS_PER_XLM, SNAPSHOT_KEY, SNAPSHOT_VERSION
- Fix undeclared `count` variable in `batch_remove_family_members`

remittance_split:
- Fix corridor error discriminant conflicts (use 35-38 not 31-34)

reporting:
- Add `TopNTooLarge = 11` variant to `ReportingError`

emergency_killswitch:
- Rename `require_matching_kill_switch_epoch` → `require_killswitch_epoch`
  (34 chars exceeds Soroban's 32-char entry point name limit)