feat(seer-explorer): Create Seer RPC methods to fetch data needed for index

[roaga]

Creates and registers Seer RPC methods that sample recent:

• transactions
• traces
• profiles
• issues

given that the Seer side will know what projects/orgs it needs data for

[codecov]

Codecov Report

Attention: Patch coverage is 92.12454% with 43 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/sentry/seer/explorer/index_data.py	75.00%	42 Missing ⚠️
tests/sentry/seer/explorer/test_index_data.py	99.32%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #95937      +/-   ##
==========================================
+ Coverage   76.32%   76.34%   +0.01%     
==========================================
  Files       10589    10594       +5     
  Lines      609979   610546     +567     
  Branches    23989    23989              
==========================================
+ Hits       465593   466131     +538     
- Misses     142454   142483      +29     
  Partials     1932     1932              

[cursor]

Bug: Snuba Query Parsing Fails on Unquoted Values

Unquoted transaction names and trace IDs in Snuba query strings (lines 139, 174, 278) lead to query parsing errors and unexpected results when these values contain spaces or special characters. This is inconsistent with the correct quoting used for transaction names on line 401.

src/sentry/seer/explorer/index_data.py#L138-L139

sentry/src/sentry/seer/explorer/index_data.py

Lines 138 to 139 in d9de7ac

	params=snuba_params,
	query_string=f"transaction:{transaction_name} project.id:{project_id}",

Fix in Cursor • Fix in Web

---

Bug: Trace Span Count Capped Incorrectly

The total_spans field in the TraceData object is incorrectly set to the count of retrieved spans, which is capped by a query limit of 1000. The actual total span count for the trace is available from an earlier query but is not used, leading to a misleading value if the trace contains more than 1000 spans.

src/sentry/seer/explorer/index_data.py#L207-L214

sentry/src/sentry/seer/explorer/index_data.py

Lines 207 to 214 in d9de7ac

	return TraceData(
	trace_id=chosen_trace_id,
	project_id=project_id,
	transaction_name=transaction_name,
	total_spans=len(spans),
	spans=spans,
	)

Fix in Cursor • Fix in Web

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