feat: add log source to stream info

[nikhilsinhaparseable]

add additional header X-P-Log-Source to stream creation
for otel logs ingestion using API POST /v1/logs, server adds log_source=OtelLogs to the stream info
which can be verified using API GET /logstream/{logstream}/info

similarly, for otel metrics, log_source=OtelMetricsLogs
and for otel traces, log_source=OtelTraces is added to the stream info
server adds log_souce=Json for stream with unknown log source value
or for the stream without the log souce header

[coveralls]

Pull Request Test Coverage Report for Build 12688690064

Details

• 11 of 67 (16.42%) changed or added relevant lines in 8 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.2%) to 12.629%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/event/format/mod.rs	2	3	66.67%
src/storage/mod.rs	0	1	0.0%
src/storage/object_storage.rs	0	1	0.0%
src/metadata.rs	0	4	0.0%
src/kafka.rs	0	6	0.0%
src/handlers/http/modal/utils/logstream_utils.rs	6	13	46.15%
src/handlers/http/logstream.rs	3	13	23.08%
src/handlers/http/ingest.rs	0	26	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/handlers/http/modal/utils/logstream_utils.rs	1	9.07%
src/handlers/http/logstream.rs	1	2.01%

Totals
Change from base Build 12682370366:	0.2%
Covered Lines:	2469
Relevant Lines:	19551

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💛 - Coveralls