feat(client): enable reliable UDP transport

[Marc-André Moreau (mamoreau-devolutions)]

Integrate the merged RDPEUDP2 and RDPEMT stack with direct client connections and route Soft-Sync-selected DVC traffic over the sideband.

Keep unsupported carriers on TCP, fall back when bootstrap fails, and renew transport security and correlation state during reconnects. Map the ActiveX compatibility property to the working transport.

Consume the complete MS-RDPEFS QueryInformation request body so valid Length, Padding, and QueryBuffer fields do not disconnect native ActiveX sessions. Add value-free failure categories for diagnosing transport and protocol fallback without exposing packet contents.

[Copilot]

Pull request overview

Prepares reliable RDP-UDP2 sidebands to reuse primary TLS certificate policy while retaining ActiveX’s truthful UDP-disabled behavior.

Changes:

• Extracts reusable rustls certificate configuration.
• Adds UDP TLS policy forwarding and current-thread tests.
• Makes ActiveX UDP settings immutable after connection setup.

Reviewed changes

Copilot reviewed 13 out of 14 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
crates/ironrdp-tls/src/rustls.rs	Reuses shared rustls configuration.
crates/ironrdp-tls/src/rustls_verifier.rs	Adds shared certificate verifier construction.
crates/ironrdp-tls/src/lib.rs	Exposes verifier support conditionally.
crates/ironrdp-tls/Cargo.toml	Adds the verifier-only feature.
crates/ironrdp-testsuite-extra/tests/rdpeudp_tokio.rs	Tests callback forwarding and current-thread operation.
crates/ironrdp-rdpeudp-tokio/src/transport.rs	Adds sideband TLS settings.
crates/ironrdp-rdpeudp-tokio/src/tls.rs	Uses shared TLS configuration.
crates/ironrdp-rdpeudp-tokio/src/multitransport.rs	Forwards sideband TLS settings.
crates/ironrdp-rdpeudp-tokio/src/lib.rs	Exports UdpTlsConfig.
crates/ironrdp-rdpeudp-tokio/README.md	Documents transport scope and strict validation.
crates/ironrdp-rdpeudp-tokio/Cargo.toml	Adds the public TLS dependency.
crates/ironrdp-activex/src/control.rs	Seals the UDP policy with connection settings.
crates/ironrdp-activex/README.md	Documents current UDP limitations.
Cargo.lock	Records the new dependency edge.

[github-actions]

This pull request is size/XXL, so automated review is disabled for it: a change this large is hard to review well in one piece, whether by a human or a model.

Please split it into focused pull requests that can each be reviewed on their own. When the parts build on each other, stacked pull requests let you open each one on top of the last without waiting for the one below to merge. Stacks require every branch to live in this repository, so from a fork, please open separate pull requests instead.

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