perf: reduce Process URI estimation overhead

[tom-sapletta-com]

Replaces #1 with a plan-first governed history.

The four implementation and test blobs are byte-identical to #1; only delivery governance was rebuilt.

Acceptance evidence:

• plan commit precedes implementation
• 10 functional tests pass
• governance: 0 errors, 0 warnings
• command/PID defaults: 1 Hz
• prior-event lookup: bounded final 4096-byte positional read

Ticket: ticket-008

[ifuri-validator-agent]

Deterministic Validator approval for exact head 53cf54cf5cd0e3214191de4ef0d931beeda6c590.

Ticket: ticket-008
Correlation ID: estimation-pr-3-ticket-008
Model: zai/glm-5.3
Reviewed diff chunks: 2
Advisory LLM verdict: APPROVE
Advisory summary: Reviewed all 2 diff chunk(s). Governed delivery of ticket-008 changes Process URI estimation sampling defaults from 10 Hz to 1 Hz in CLI, measure_command, and observe_pid, and replaces the full-file prior-event scan with a bounded positional tail read. Implementation is consistent with the recorded intent, rollback plan, and acceptance criteria. All test and governance checks pass. | Chunk 2 of the diff adds test coverage for monitor 1 Hz defaults and bounded tail reads via os.pread. Tests are well-constructed and all checks pass.
Advisory findings: none
The LLM output above is advisory and was not used as the approval trust root.
Merge will be attempted after this approval when explicitly authorized.

Decision record (recomputable)

DECISION D-008-7523
TICKET ticket-008
HEAD_SHA 53cf54cf5cd0e3214191de4ef0d931beeda6c590
CORRELATION_ID estimation-pr-3-ticket-008
ACTOR agent:ifuri-validator-agent[bot]
APPLIED_RULE P-CORE-015
INPUT author_login = "tom-sapletta-com"
INPUT observed_checks = ["governance / remote lifecycle=PASS","windows-governance=PASS","governance / enforce=PASS","test=PASS"]
INPUT required_checks = ["test","windows-governance"]
INPUT required_checks_source = "protected registry (governance/required-checks.json)"
INPUT reviewer_login = "ifuri-validator-agent[bot]"
VERDICT APPROVE AUTHORITY DETERMINISTIC
REJECTED REQUEST_CHANGES BECAUSE NO_UNSAFE_CHANGE_REASON_FOUND
ADVISORY llm_verdict = "APPROVE" MODEL "zai/glm-5.3"
ASSERT VERDICT_AUTHORITY != "ADVISORY"