Odoo Release Updates

[IMP] fleet: expand the domain of fleet managers

[IMP] hr_fleet: changing name of contract state

[IMP] test_lint, *: Indexing of `Many2one` fields used in `related` fields

[FIX] fleet: don't plan to change car when new bike choosen

[FIX] mail,sms,calendar,fleet,l10n_*: fix write '' to selection fields

[FIX] Fleet: Fixing 'available' fleet filter domain

[IMP] web,*: follow up for M3.1 style commit

Refactors tracking API to use simpler methods, adds mail.track.mixin, and improves test coverage across modules.

[IMP] *: use type="bytes" in data files

[REF] *: migrate type="base64" to "bytes"

[IMP] mail: update tracking API

[IMP] mail: cleanup track naming and usage

[IMP] fleet: add multi-company support to vehicle models

[IMP] *: rename "Cancel" to "Discard"

[IMP] fleet: improve vehicle and model form layouts

[IMP] mail: make activity delete action explicit and safer

[FIX] fleet: Add a default to acquisition date of vehicle for baseline ATN calculation

[IMP] fleet: add contract start and expiration date filters

[IMP] fleet: split contract and service types configuration

[IMP] fleet: service types config show to fleet admin

[FIX] fleet: allow officers to edit 'Make Vehicle Available' field

[FIX] fleet, point_of_sale: Adjust VAT -> tax

[ADD] base: update apps icons

[IMP] web, *: improve TextInput on touch and desktop

[IMP] fleet: Employee avatar is not clickable

[IMP] fleet: odometer reporting

[IMP] fleet: improve vehicles ux

[IMP] hr_fleet: add Cars History Smart button to res.partner

[IMP] web, *: use rounded-pill for badge consistency

[IMP] *: rename "Cancel" to "Discard"