Prepare the v1.5.0 release notes

docs/releases/README.md

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+# Release Notes
+
+This directory contains the maintained release-note text for Narratio releases.
+The corresponding Gitea release is the canonical source for downloadable
+binaries and checksums.
+
+- [v1.5.0](v1.5.0.md)

docs/releases/v1.5.0.md

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+# Narratio v1.5.0
+
+Narratio v1.5.0 makes repeated post-transcript artifact development faster and
+more explicit while retaining the fixed, stage-driven pipeline model.
+
+## Highlights
+
+- The canonical pipeline now completes deterministic rendering before
+  extraction, cleanly separating transcript-generating stages from
+  artifact-generating stages.
+- `narratio run` and `narratio session plan` accept inclusive `--from` and
+  `--through` bounds. Excluded transcript stages are not executed or
+  invalidated by a bounded artifact-regeneration run.
+- `narratio regenerate-artifacts SESSION` is an exact convenience alias for a
+  forced run from `extract` through `analyze`, including focused
+  `--artifacts` selections.
+- Configured Scriptorium artifacts now have independent,
+  manifest-authoritative freshness. Narratio reuses validated current work,
+  rebuilds stale prerequisites in dependency order, and persists successful,
+  failed, and newly stale artifact state when an analysis invocation only
+  partially succeeds.
+- Publish consumes only configured artifacts backed by current manifest
+  evidence; incidental or tampered files are not promoted as current output.
+
+## Reliability And Administration
+
+- Bounded prerequisites are checked again under the session lock before any
+  run mutation, closing a concurrent-run race.
+- Analysis fingerprints are stable across executable and configuration path
+  changes and continue to cover only Narratio-observable semantic inputs.
+- Runner composition now carries one validated execution plan from command
+  parsing through prerequisite validation, adapter composition, manifest
+  recording, and stage execution.
+- `narratio version` reports the exact tag embedded in official release
+  binaries; ordinary source builds report `dev`.
+
+## Upgrade Notes
+
+- Existing unbounded commands and direct `run-stage`, `analyze`, and `publish`
+  workflows retain their meanings.
+- Manifests written before artifact-level analysis state remain readable.
+  Legacy aggregate analysis success is not sufficient freshness evidence, so
+  the first analysis evaluation after upgrading may regenerate configured
+  artifacts once.
+- Narratio cannot observe executable contents or configuration, prompt,
+  profile, module, and other files loaded privately by Scriptorium. Explicitly
+  force affected artifacts after changing those private inputs.