[r3dbars]

Removes AppLogSink's unused published entries buffer and observable conformance. Production consumers only append to the local file; no view reads or observes these entries. Correct the debug-panel and feedback-email descriptions to match that behavior.

Redaction tests now read the owned log file after writes finish. Ordering tests compare file output with the submitted messages, and empty-session coverage checks that only the session marker was written.

Addresses OBSERVABILITY-5 individually. Stacked on #2393 (6f3361a14704e8008ca34b0c44f78489e1854d45) for its existing ordered-write/flush seam. Retarget this child before merging/deleting its parent branch. #2336 remains untouched; OBSERVABILITY-9 rotation wording and DOCS-19's Writing sink row are separate proposals.

Validation:

• Independent full child diff and full stack against fetched origin/main (8a38235e): GREEN, including the owned fixture cleanup and actual feedback rawLogLines: [] caller.
• Actual focused suites: ObservabilityLogWriter 62/62 and AppLogSinkOrdering 5/5 assertions passed. Only invented data and owned temporary log files were used; no real logs read.
• Exact head 24e9e61fa: canonical bash check.sh had 24 PASS, one explicit unfiltered-fast safety failure (exit 3), and an orchestration SKIP. Overall FAIL retained; source stable and clean. App build and concurrency census passed; raw proof archived.
• Standalone preflight passed. verify-change.sh skipped launch speed because Transcripted is already running; nothing was quit.
• Exact-head hosted checks remain pending. This new child is outside frozen Wave3.

Draft pending remaining verification. No release or merge performed.