Builds the network foundation for the Wear OS vertical PoC:
OkHttp-based UploadClient mirroring doctate-client-core's wire protocol
(multipart /api/upload, X-API-Key, transient/terminal classification),
BuildConfig-backed Settings sourced from local.properties, CaseId factory,
DoctateApp service locator, MockWebServer-based UploadClientTest for
wire-format assertions, plus the manifest/permissions/network-security-
config plumbing for emulator-loopback cleartext.
MainActivity is still the placeholder UI; audio recording, ViewModel,
and recording screen come in follow-up commits.
Brummel
8306dd8c47