feat(truapi)!: funding provider trait, reports and settlement

[filvecchiato]

A provider's worker runs the funding sessions the user chose it for, and the host decides how they end. Stacked on the test hosts PR.

• FundingProvider trait (22, Worker only): serveSubscribe replays the caller's sessions in flight, then streams new ones and cancel requests; report stores each update on the session; presentFrame shows one of the provider's screens in a host frame
• Reports come only from the assigned provider and only move forward: AwaitingPayment, PaymentReceived, Converting, Crediting { top_up_id, amount } (up to three, for partial-claim retries), Delivered; outbound Collecting { payment_id, amount }; Failed before funds move. A top-up or payment id another of the provider's sessions already names is refused with DuplicateId, so one claim never settles two sessions
• The core ends a session as Delivered from what the named top-ups claimed and Released once the named payment completes, following TopUpPlatform and PaymentPlatform; nothing moved fails it. Once funds move, the provider cannot fail the session and its deadline no longer applies
• select_funding_provider (Rust and native) assigns a session; the core holds the provider's worker while it is open, and again after a restart
• Cancel ends an unassigned session, asks the provider of an assigned one, and is refused once the provider has seen the user's payment
• make e2e-funding-cli runs a provider worker on the CLI host: the scripted overlay hands provide sessions to the product that asked, scripted engines complete its top-ups and payment requests, and an inbound session resumes and is delivered after a host restart (13 cases)

Breaking: hosts implement present_provider_frame on FundingPlatform (natively NativeFundingCallbacks).

Not here: candidates and quotes, so select_funding_provider accepts any product id for now.

Part of #1145, #1140, #1141.

[github-actions]

Bundle size report

Compared with main at 54b6bc4.

	Raw	Gzip	Brotli
truapi-host	7.88 MiB (+93.6 KiB, +1.2%)	5.66 MiB (+31.4 KiB, +0.5%)	5.39 MiB (+21.9 KiB, +0.4%)
truapi-provider	4.03 MiB	1.27 MiB	959.8 KiB
truapi	5.78 MiB (+65.5 KiB, +1.1%)	814.7 KiB (+9.8 KiB, +1.2%)	667.6 KiB (+7.7 KiB, +1.2%)
Total	17.69 MiB (+159.1 KiB, +0.9%)	7.73 MiB (+41.2 KiB, +0.5%)	6.98 MiB (+29.5 KiB, +0.4%)

WebAssembly modules

	Raw	Gzip	Brotli
truapi-host/wasm/web/truapi_server_bg.wasm	2.78 MiB (+93.2 KiB, +3.4%)	993.5 KiB (+31.3 KiB, +3.3%)	748.2 KiB (+21.7 KiB, +3.0%)
truapi-host/wasm/web/truapi_verifiable_bg.wasm	4.89 MiB	4.64 MiB	4.61 MiB
truapi-provider/truapi_provider_bg.wasm	3.99 MiB	1.26 MiB	952.1 KiB

Changed files (10)

	Raw	Gzip	Brotli
truapi-host/wasm/web/truapi_server_bg.wasm	2.78 MiB (+93.2 KiB, +3.4%)	993.5 KiB (+31.3 KiB, +3.3%)	748.2 KiB (+21.7 KiB, +3.0%)
truapi/explorer/codegen/types.js	227.6 KiB (+23.2 KiB, +11.3%)	31.1 KiB (+3.2 KiB, +11.5%)	25.0 KiB (+2.5 KiB, +11.3%)
truapi/playground/codegen/truapi-dts.js	295.7 KiB (+22.9 KiB, +8.4%)	50.8 KiB (+3.9 KiB, +8.2%)	41.0 KiB (+3.1 KiB, +8.0%)
truapi/playground/codegen/services.js	100.7 KiB (+6.1 KiB, +6.5%)	15.1 KiB (+906 B, +6.2%)	12.7 KiB (+721 B, +5.9%)
truapi/generated/types.js	65.4 KiB (+5.5 KiB, +9.3%)	8.0 KiB (+793 B, +10.7%)	6.7 KiB (+551 B, +8.7%)
truapi/generated/client.js	71.6 KiB (+5.1 KiB, +7.7%)	10.7 KiB (+800 B, +7.9%)	8.9 KiB (+653 B, +7.7%)
truapi/generated/wire-decode.js	29.2 KiB (+2.1 KiB, +7.6%)	3.1 KiB (+173 B, +5.9%)	2.6 KiB (+142 B, +5.7%)
truapi/generated/wire-table.js	9.1 KiB (+601 B, +6.9%)	1.6 KiB (+72 B, +4.6%)	1.3 KiB (+53 B, +4.3%)
truapi-host/generated/host-callbacks.js	10.5 KiB (+399 B, +3.9%)	3.3 KiB (+122 B, +3.7%)	2.8 KiB (+113 B, +4.0%)
truapi-host/wasm/web/truapi_server.js	57.8 KiB (+3 B)	10.5 KiB (-1 B)	9.1 KiB (+16 B, +0.2%)

_{Commit: e67c493}

[github-actions]

CI Status: not green, 1 item needs attention.

• playground: failure

All job results

job	result
android-bindings	success
bundle-size	success
changes	success
changeset-guard	success
cli-package	success
codegen	success
e2e	skipped
explorer	success
funding-battery	success
headless-install	success
host-android-bindings	success
host-android-detekt	success
host-wasm	success
ios-bindings	success
ios-swift	success
licenses	success
playground	failure
provider-android-bindings	success
release-guard	success
rust	success
ts-client	success
ts-debugger	success
ts-host	success
wasm-provider	success
workflow-lint	success

Signing credentials: failure as of 2026-10-07, a release may fail

_{Commit e67c4935 · run log}

[filvecchiato]

Moved to #1317 (provider trait, reports and settlement), stacked on #1315.