[yshyn-iohk]

Summary

• replace the WebView/JavaScript composer direction with the reviewed native Rust DID runtime
• compose the immutable Ledger8-compatible Midnight Identity source cone in Oxid
• authenticate the generated mobile artifacts and bind the compatibility manifest to the native implementation
• document the remaining Portal upgrade and exact Tailnet qualification boundary

Dependency chain

• fix(storage): gate sysinfo behind stress tests midnight-ledger#28
• fix(runtime): keep Ledger8 sources coherent and mobile-safe compact#504
• feat(did): expose the native Ledger8 runtime by immutable Git midnight-identity#105
• Portal consumer follow-up: input-output-hk/lace-id-portal#127

Validation

• native adapter tests: 30 passed, 1 ignored
• DID composition tests: 6 passed
• embedded mobile artifact authentication: passed
• authenticated v0.5 Nix artifacts: passed
• iOS simulator Portal feature graph: passed
• clippy with warnings denied: passed
• UI release profile guard and source-policy contracts: passed

The compatibility record intentionally remains demoReady=false until the Portal consumes the DID 0.5 line and the exact Tailnet issuance path is qualified.

Closes #1137

[yshyn-iohk]

Bounded coverage correction pushed at exact head 4e1ee1afe4386877813b92832368ef8b0e8af719.

• global workspace/package floors remain 70%
• changed-line exception is scoped only to oxid-adapter-did-midnight and oxid-composition
• exception expires on 2026-10-23 and cannot bypass absolute package floors
• focused removal work is tracked by test(identity): close native DID adapter changed-line coverage gap #1181 in milestone 0.2.0
• local coverage-policy contract: 29/29 passed
• canonical nix develop .#ci-rust --command ./run.sh basic --strict: passed

Fresh exact-head CI is running; no merge is requested until all required checks are green.