chore: bump forc-client to sway 0.71.2

[JoshuaBatty]

Summary

• Update workspace Sway/Forc dependencies from 0.71.0 to published 0.71.2 crates on crates.io
• Bump forc-client to 0.71.3 with changelog entry for sway 0.71.2 compatibility
• No other workspace members bumped (forc-crypto, forc-node, forc-wallet, forc-tracing unchanged — fuel deps unchanged and no direct sway compiler deps)

Test plan

• cargo fmt --all -- --check
• cargo clippy --all-targets --all-features
• cargo package -p forc-client --allow-dirty
• cargo test --all-features -- --test-threads 1 (6 forc-client unit tests fail locally with fuel-core process exited before reporting its bound address — appears environmental, unrelated to dependency bump)
• CI green
• After merge, cut release tag forc-client-0.71.3

[cursor]

PR Summary

Low Risk
Dependency and test-expectation updates only; no application logic changes beyond aligning with published Sway 0.71.2 artifacts.

Overview
Bumps workspace Sway and Forc crates.io dependencies from 0.71.0 to 0.71.2, and releases forc-client 0.71.3 with a changelog note for Sway 0.71.2 compatibility. Cargo.lock reflects the new forc / sway-* versions and drops transitive crates tied to the old forc-pkg stack (e.g. IPFS-related packages).

Deploy integration tests in forc-client/tests/deploy.rs update expected contract and proxy IDs to match bytecode produced by the newer compiler toolchain. Other workspace members (forc-crypto, forc-node, forc-wallet, forc-tracing) are not version-bumped in this PR.

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