Release gate: be-iprk — bd show --json count-only + iter flags (PR #4010)

• Bead: be-iprk (Review: be-ijck6q bd show --json count-only + iter flags, PR #4010)
• Branch: feat/be-ijck6q-show-json-iter (HEAD: 0a19244ca)
• Evaluated: 2026-05-19 by beads/deployer

What ships

• bd show --json default now emits dependent_count/dependency_count/comment_count (O(1) COUNT queries) instead of full slices
• --include-dependents: streams via IterDependentsWithMetadata, shallow-copies each item
• --include-comments: streams via IterIssueComments
• Storage layer: CountDependents, CountDependencies, CountIssueComments, CountIssues, CountEvents + Dolt/EmbeddedDolt implementations; PG stubs; OTel telemetry wrappers

Gate criteria

#	Criterion	Result	Evidence
1	Review PASS present	PASS	be-iprk notes: "VERDICT: pass... DECISION: PASS — label needs-deploy." 2 LOW non-blocking findings documented; no HIGH findings.
2	Acceptance criteria met	PASS	Default JSON output uses COUNT(*) queries; --include-dependents and --include-comments flags stream via Iter; storage layer additions complete across Dolt/EmbeddedDolt/PG stubs
3	Tests pass	PASS	CI 40/40 SUCCESS on PR #4010
4	No high-severity review findings open	PASS	0 HIGH findings; 2 LOW findings in be-iprk: (1) shallowDependentsForJSON defined but not called in production path; (2) defer iter.Close() function-scoped accumulation — both non-blocking
5	Final branch is clean	PASS	git status clean
6	Branch diverges cleanly from main	PASS	No conflicts against origin/main

Verdict: PASS