[feat] [observation] trajectory observe

[JqRrt]

What type of PR is this?

Check the PR title

• This PR title match the format: [<type>][<scope>] <description>. For example: [fix][backend] flaky fix
• The description of this PR title is user-oriented and clear enough for others to understand.
• Add documentation if the current PR requires user awareness at the usage level.
• This PR is written in English. PRs not in English will not be reviewed.

(Optional) Translate the PR title into Chinese

(Optional) More detailed description for this PR(en: English/zh: Chinese)

en:
zh(optional):

(Optional) Which issue(s) this PR fixes

[mocayo]

Submission history contains excessive meaningless information, please organize it

[mocayo]

reorganize commit message and resolve conflicts

[codecov]

Codecov Report

❌ Patch coverage is 83.15018% with 138 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...bservability/domain/trace/service/trace_service.go	86.05%	16 Missing and 13 partials ⚠️
...bility/domain/trace/entity/loop_span/trajectory.go	89.39%	14 Missing and 14 partials ⚠️
backend/modules/observability/infra/repo/trace.go	63.63%	19 Missing and 1 partial ⚠️
...ility/domain/trace/service/trace_export_service.go	45.45%	15 Missing and 3 partials ⚠️
...api/handler/coze/loop/apis/eval_open_apiservice.go	0.00%	9 Missing ⚠️
...i/handler/coze/loop/apis/evaluation_set_service.go	0.00%	9 Missing ⚠️
...dler/coze/loop/apis/observability_trace_service.go	0.00%	6 Missing ⚠️
...vability/application/convertor/trace/trajectory.go	96.22%	2 Missing and 2 partials ⚠️
backend/modules/observability/application/trace.go	93.65%	2 Missing and 2 partials ⚠️
...domain/task/service/taskexe/tracehub/subscriber.go	0.00%	2 Missing and 1 partial ⚠️
... and 4 more

@@            Coverage Diff             @@
##             main     #332      +/-   ##
==========================================
+ Coverage   69.88%   70.06%   +0.18%     
==========================================
  Files         588      590       +2     
  Lines       54452    55250     +798     
==========================================
+ Hits        38052    38712     +660     
- Misses      13525    13626     +101     
- Partials     2875     2912      +37     

Flag	Coverage Δ
unittests	70.06% <83.15%> (+0.18%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...bility/application/convertor/trace/trace_export.go	95.85% <100.00%> (+0.11%)	⬆️
.../modules/observability/domain/task/entity/event.go	58.13% <100.00%> (ø)
...dules/observability/domain/trace/entity/dataset.go	85.60% <100.00%> (+0.23%)	⬆️
...bservability/domain/trace/entity/loop_span/span.go	75.92% <100.00%> (+0.18%)	⬆️
...infra/mq/producer/span_with_annotation_producer.go	95.23% <100.00%> (ø)
...modules/evaluation/application/eval_openapi_app.go	91.50% <0.00%> (-0.30%)	⬇️
...dules/evaluation/application/evaluation_set_app.go	62.71% <0.00%> (-0.28%)	⬇️
.../observability/application/convertor/trace/span.go	86.55% <95.00%> (+1.70%)	⬆️
...vability/infra/rpc/evaluationset/evaluation_set.go	45.16% <33.33%> (-0.13%)	⬇️
...domain/task/service/taskexe/tracehub/subscriber.go	68.42% <0.00%> (-1.85%)	⬇️
... and 9 more

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5177532...2f90dfb. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[CozeLoop]

Summary: Found compile-blocking issue in otel FieldConf map and a missing middleware function reference in router.

• [🚫Must Fix] backend/modules/observability/lib/otel/otel_convert.go: Struct literal for FieldConf uses non-existent field names (attributeKey, isTag, dataType). Replace with AttributeKey, IsTag, DataType.
• [🚨Should Fix] backend/api/router/coze/loop/apis/coze.loop.apis.go: Route references _gettrajectoryconfigMw but the stub is not defined in middleware.go. Add the missing middleware function.

Please address these to unblock compilation and ensure routing consistency.