Updated transcript artifact names and canonical paths to use a consistent, role-based nomenclature

docs/integrations/seriatim.md

@@ -5,7 +5,7 @@ Define Narratio's adapter contract for merge, normalize, and trim subprocess inv
 
 ## Inputs and Outputs
 Inputs:
-- `MergeRequest`: raw/normalized transcript inputs, output path, optional report, speaker/autocorrect paths, logs/config
+- `MergeRequest`: raw/per-speaker normalized transcript inputs, base output path, optional report, speaker/autocorrect paths, logs/config
 - `NormalizeRequest`: input transcript, output path, schema, optional report, timeout/log/config
 - `TrimRequest`: input transcript, output path, keep selector, timeout/log/config
 
@@ -44,8 +44,8 @@ Via `pipeline.seriatim.*` mapped in app/stage wiring:
 ## Failure Behavior
 - Constructor fails for invalid binary/timeout/output-schema/coalesce-gap.
 - Merge fails on missing output path/inputs/report path (if enabled), subprocess errors, invalid merged output JSON, invalid report JSON.
-- Normalize fails on missing input/output, invalid schema, subprocess errors, invalid normalized output JSON shape, invalid report JSON.
-- Trim fails on missing input/output/keep selector, subprocess errors, invalid trimmed output JSON shape.
+- Normalize fails on missing input/output, invalid schema, subprocess errors, invalid final output JSON shape, invalid report JSON.
+- Trim fails on missing input/output/keep selector, subprocess errors, invalid final-trimmed output JSON shape.
 
 ## Tests to Inspect Before Changing
 - `internal/adapters/seriatim/subprocess_test.go`
@@ -56,5 +56,5 @@ Via `pipeline.seriatim.*` mapped in app/stage wiring:
 
 ## Architectural Invariants
 - Supported output schemas are limited to `seriatim-minimal`, `seriatim-intermediate`, `seriatim-full`.
-- Normalize/trim outputs must include `segments` arrays.
+- Final and final-trimmed outputs must include `segments` arrays.
 - Merge/normalize/trim all route through deterministic subprocess invocation.