Modernize up-streamer internals and land deterministic transport smoke validation

[PLeVasseur]

Summary

• Lands a long-planned modernization stack across up-streamer internals (control plane/data plane/routing/runtime boundaries), structured observability, and lifecycle hardening while preserving transport behavior intent.
• Introduces deterministic cross-transport smoke validation as a first-class workflow via utils/transport-smoke-suite, including scenario binaries, matrix execution, fixture audits/contracts, and reproducible reporting artifacts.
• Completes the strict file-backed scenario-claims refactor (no inline fallback), with report metadata provenance and matrix override guardrails.

Scope Clarification (important)

This branch is large by design and includes work that has been developed in parallel with open PR #77.

• Relative to main, this branch is ahead by 52 commits.
• 10 commits are patch-equivalent to commits already covered by fix(issue-74): enforce left-side publish authority mapping and add reproducible CLI validation #77 (bugfix/issue-74-left-topic-authority).
• Review focus for this PR should be the remaining 42 commits unique to this branch.

Because #77 base is not available as the PR base target in upstream, this PR is opened against main with explicit overlap disclosure.

Why this refactor should inspire confidence

• Changes were landed incrementally across checkpointed commits, not as one opaque rewrite.
• Domain boundaries were tightened intentionally (route lifecycle, resolver composition, ingress/egress abstractions, runtime adapter isolation).
• Structured tracing now provides clearer lifecycle/routing/egress diagnostics for debugging and operational triage.
• Deterministic smoke validation now exercises canonical MQTT and SOME/IP request/response + pub/sub scenarios with reproducible artifacts.
• File-based claim loading is strict and explicit: missing/malformed/mismatched claims are hard failures.

Notable Deliverables

• Core modernization and reliability/performance hardening in up-streamer and integration surfaces.
• Criterion guardrail utility and advisory CI workflow.
• Transport smoke capstone matrix runner and CI workflow.
• 8 canonical scenario binaries with deterministic orchestration and artifacted reports.
• File-backed claims in utils/transport-smoke-suite/claims/*.json for all scenarios.
• Matrix --claims-path propagation + multi-scenario file override rejection.
• Scenario report schema growth to include claims_source_path metadata.

Validation

Static checks

• cargo fmt -- --check
• cargo clippy -p transport-smoke-suite --all-targets -- -W warnings -D warnings
• cargo test -p transport-smoke-suite

Runtime checks for claims/matrix behavior

• Single scenario, default claims path
• Single scenario, explicit claims file override
• Matrix run, default claims path
• Matrix run, explicit claims directory override
• Matrix fast-fail for multi-scenario + file override
• Full default-claims matrix dry run: cargo run -p transport-smoke-suite --bin transport-smoke-matrix -- --all (8/8 pass)

Review Guidance

To isolate unique commits from #77 overlap:

git log --oneline bugfix/issue-74-left-topic-authority..cleanup/refactor-upstream-main

That range captures the modernization + deterministic smoke suite work intended for this PR review.

Review Walkthrough (staged)

This PR currently shows 53 commits against main.
The first 10 commits overlap with open PR #77 (bugfix/issue-74-left-topic-authority) and are not the primary review target here.
Please focus on the remaining 43 unique commits.

1. Exclude overlap first

   • git log --oneline 7d1a6c7..cleanup/refactor-upstream-main

2. Stage 1 - Core up-streamer domain modernization (18 commits)

   • git log --oneline e76dc3d^..99c0549
   • git diff --stat e76dc3d^..99c0549
   • Focus: route lifecycle boundaries, resolver composition, runtime adapter isolation, subscription identity/dedupe behavior.

3. Stage 2 - Runtime hardening, observability, and performance (16 commits)

   • git log --oneline 72abe59^..f16f155
   • git diff --stat 72abe59^..f16f155
   • Focus: structured tracing, ingress/egress lifecycle hardening, lock narrowing, routing/runtime performance work.

4. Stage 3 - Deterministic transport smoke suite (8 commits)

   • git log --oneline 898f08d^..ad44a81
   • git diff --stat 898f08d^..ad44a81
   • Focus: matrix orchestration, MQTT/SOME-IP scenarios, strict file-backed claims/contracts.

5. Stage 4 - Final metadata-only touch (1 commit)

   • git show --stat 86e7e4c

[PLeVasseur]

I am well-aware that asking review of this is pretty unreasonable without any kind of orientation.

I'm going to walk through it in tomorrow's meeting a bit.