Rust: Change canonical paths for trait items

[hvitved]

Summary

• use crate::Trait::item canonical paths for Rust trait items instead of <_ as crate::Trait>::item
• update Rust library models, tests, generated expectations, and documentation to the new format
• add a change note for custom data extension model authors

Testing

• regenerated affected Rust CodeQL test expectations with codeql test run --learn
• all 38 affected tests passed

[Copilot]

Pull request overview

Changes Rust trait-item canonical paths to the simpler Trait::item format and migrates affected models, documentation, and generated expectations.

Changes:

• Updates canonical-path generation for trait items.
• Migrates Rust library and test models to the new format.
• Updates documentation, change notes, and generated expectations.

Show a summary per file

File	Description
rust/ql/test/query-tests/security/CWE-918/RequestForgery.expected	Regenerates request-forgery expectations.
rust/ql/test/query-tests/security/CWE-798/HardcodedCryptographicValue.expected	Regenerates cryptographic-value expectations.
rust/ql/test/query-tests/security/CWE-770/UncontrolledAllocationSize.expected	Regenerates allocation-size expectations.
rust/ql/test/query-tests/security/CWE-312/CleartextLogging.expected	Regenerates logging expectations.
rust/ql/test/query-tests/security/CWE-117/LogInjection.expected	Regenerates log-injection expectations.
rust/ql/test/query-tests/security/CWE-079/warp/XSS.expected	Regenerates Warp XSS expectations.
rust/ql/test/query-tests/security/CWE-022/TaintedPath.expected	Regenerates tainted-path expectations.
rust/ql/test/library-tests/dataflow/strings/inline-taint-flow.expected	Updates string data-flow expectations.
rust/ql/test/library-tests/dataflow/sources/web_frameworks/InlineFlow.expected	Updates web-framework model expectations.
rust/ql/test/library-tests/dataflow/sources/env/InlineFlow.expected	Updates environment-source expectations.
rust/ql/test/library-tests/dataflow/sources/database/InlineFlow.expected	Updates database-source expectations.
rust/ql/test/library-tests/dataflow/models/models.ext.yml	Migrates test extension models.
rust/ql/test/library-tests/dataflow/models/models.expected	Regenerates model expectations.
rust/ql/test/library-tests/dataflow/modeled/inline-flow.expected	Updates modeled-flow expectations.
rust/ql/test/library-tests/dataflow/local/inline-flow.expected	Updates local-flow expectations.
rust/ql/test/library-tests/dataflow/global/inline-flow.expected	Updates global-flow expectations.
rust/ql/test/library-tests/dataflow/collections/inline-flow.expected	Updates collection-flow expectations.
rust/ql/test/extractor-tests/canonical_path/canonical_paths.expected	Verifies new extracted canonical paths.
rust/ql/lib/codeql/rust/internal/PathResolution.qll	Implements the new trait-item path format.
rust/ql/lib/codeql/rust/frameworks/warp.model.yml	Migrates Warp trait models.
rust/ql/lib/codeql/rust/frameworks/tokio/io.model.yml	Migrates Tokio I/O trait models.
rust/ql/lib/codeql/rust/frameworks/stdlib/io.model.yml	Migrates standard I/O trait models.
rust/ql/lib/codeql/rust/frameworks/stdlib/core.model.yml	Migrates core trait models.
rust/ql/lib/codeql/rust/frameworks/stdlib/alloc.model.yml	Migrates allocation trait models.
rust/ql/lib/codeql/rust/frameworks/sqlx.model.yml	Migrates SQLx trait models.
rust/ql/lib/codeql/rust/frameworks/rustcrypto/rustcrypto.model.yml	Migrates RustCrypto trait models.
rust/ql/lib/codeql/rust/frameworks/mysql.model.yml	Migrates MySQL trait models.
rust/ql/lib/codeql/rust/frameworks/mysql-async.model.yml	Migrates asynchronous MySQL models.
rust/ql/lib/codeql/rust/frameworks/futures.model.yml	Migrates Futures I/O models.
rust/ql/lib/codeql/rust/frameworks/asyncstd/io.model.yml	Migrates async-std I/O models.
rust/ql/lib/codeql/rust/dataflow/internal/DataFlowImpl.qll	Updates an internal path reference.
rust/ql/lib/change-notes/2026-08-19-trait-canonical-paths.md	Documents the model migration.
docs/codeql/codeql-language-guides/customizing-library-models-for-rust.rst	Documents the new canonical-path syntax.

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• Files reviewed: 39/39 changed files
• Comments generated: 1
• Review effort level: Balanced