[VibeSWE]

Description

OTLP logs, metrics, and traces reject valid JSON requests such as Content-Type: application/json; charset=utf-8 because dispatch compares the complete header string. Classify the parsed type/subtype using Actix's existing mime re-export so parameters, media-type case, and surrounding HTTP whitespace no longer prevent ingestion.

Dispatch deliberately ignores parameter text, including malformed parameters, and preserves HTTP 400 responses and existing diagnostics for missing/unsupported headers. Protobuf remains unsupported; parameterized protobuf gets the existing protobuf-specific error. OTLP JSON suffix aliases and gRPC remain out of scope. No dependencies or public interfaces change.

Validation

• Baseline library suite: 1,045 passed, 0 failed, 2 ignored.
• Changed library suite: 1,050 passed, 0 failed, 2 ignored. New coverage includes a 45-row classification table and shared request processing for all three signals.
• Real baseline/changed servers: 40/40 HTTP cases passed on each; 15 requests changed from 400 to successful ingestion, three parameterized protobuf responses gained the expected specific diagnostic, and 22 responses were unchanged, including plain JSON ingestion.
• Independent 41-case header matrix: no mismatches.
• cargo clippy --locked --all-targets passed with existing warnings outside the changed file; formatting and whitespace checks passed.
• Isolated optimized classifier benchmark (21 rounds, two million iterations per round): bare JSON dispatch increased from ~1.2 ns to ~23.4 ns and adds one allocation per request. This measures the classifier with the System allocator, not full ingestion throughput. This tradeoff is accepted.

Backend checks used P_BUILD_NO_UI=1, CARGO_BUILD_JOBS=4, and serialized Cargo commands.

---

^{Need help on this PR? Tag @codesmith-bot with what you need.}

[VibeSWE]

Independent Sol6.1 review of 5d837c7a67d5c8f454654dc6ee67b43c888fcb29 against 547c5118583b8e3884a2b6920c3b5a0ffa675f87: no actionable findings.

The shared OTLP classifier implements the approved essence-only policy, including ignoring malformed parameters, case normalization, and HTTP SP/HTAB trimming. JSON dispatch, original unsupported-header diagnostics, missing/non-text header handling, and protobuf rejection remain consistent with the brief. No additional media-type aliases or plain JSON/Kinesis changes were introduced.

Reviewed the five added tests and the parent-provided validation artifacts matching source SHA-256 b264192148b860074f0ec77c481e865c93588d350854fa0d327c6d18ac40a769: 1,050 passing library tests, both 40-case HTTP runs, and the independent 41-case classifier matrix. No builds or tests were rerun for this review.