chore: v0.2.0 changelog (#629)

* chore: changelog for v0.2.0 release

* chore: add changie entry for changelog PR

Author: Muizzkolapo

.changes/unreleased/Breaking Change-20260523-627000.yaml

@@ -0,0 +1,3 @@
+kind: Under the Hood
+body: "Generate v0.2.0 changelog via changie batch"
+time: 2026-05-23T06:29:00.000000Z

.changes/unreleased/Bug Fix-20260523-625000.yaml

@@ -0,0 +1,34 @@
+## v0.2.0 - 2026-05-23
+### Breaking Change
+* Removed cross-workflow chaining: upstream: config key, --upstream/--downstream CLI flags,
+WorkflowOrchestrator, and VirtualAction injection. Workflows are self-contained.
+Users with upstream: in config will see an unknown-key warning.
+
+### Enhancement or New Feature
+* v0.2.0 Quality Hardening — 25 fixes from comprehensive codebase audit:
+- Storage errors now propagate instead of silently returning COMPLETED
+- Schema migration uses ALTER TABLE instead of DROP TABLE (preserves data on upgrade)
+- Disposition table clears conflicting rows before writing terminal state
+- --fresh flag clears all state (source_data, batch recovery, batch registry)
+- Preflight key verifier fails on infrastructure errors (SSL, proxy, DNS)
+- Batch SQLite commits batched (10-50x perf improvement for 1000+ records)
+- Config change detection invalidates stale completed actions on prompt/model/schema change
+- Retry Ctrl+C writes manifest checkpoint for crash recovery
+- LLM hardening (token overflow guard, prompt injection fix, parse error parity across providers)
+- Source GUID uses uuid4 to prevent collision on duplicate/expanded records
+- Thread safety for ActionStateManager and atomic_json_write
+- O(n²) lineage lookup replaced with dict index
+- Dead code removed (12 functions, 11 aliases, ghost mistral directory)
+- 33 new tests covering 7 previously untested critical paths
+- 15 false-positive tests fixed
+- Observability gaps closed (record identity in logs, LLM call duration, batch events)
+- DB maintenance (WAL checkpoint, disposition cleanup, prompt trace retention)
+
+### Bug Fix
+* Batch/online content parity: first-stage batch actions now synthesize the source namespace,
+matching online mode. Fixes source.page_content resolving as null in batch workflows.
+
+* Batch disposition dedup prevents UNIQUE constraint violations on resume.
+Deferred dispositions now cleared using per-action name instead of workflow name.
+Prep failure logs show source_guid instead of array index.
+

.changes/unreleased/Bug Fix-20260523-626000.yaml

@@ -7,6 +7,41 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html),
 and is generated by [Changie](https://github.com/miniscruff/changie).
 
 
+## v0.2.0 - 2026-05-23
+### Breaking Change
+* Removed cross-workflow chaining: upstream: config key, --upstream/--downstream CLI flags,
+WorkflowOrchestrator, and VirtualAction injection. Workflows are self-contained.
+Users with upstream: in config will see an unknown-key warning.
+
+### Enhancement or New Feature
+* v0.2.0 Quality Hardening — 25 fixes from comprehensive codebase audit:
+- Storage errors now propagate instead of silently returning COMPLETED
+- Schema migration uses ALTER TABLE instead of DROP TABLE (preserves data on upgrade)
+- Disposition table clears conflicting rows before writing terminal state
+- --fresh flag clears all state (source_data, batch recovery, batch registry)
+- Preflight key verifier fails on infrastructure errors (SSL, proxy, DNS)
+- Batch SQLite commits batched (10-50x perf improvement for 1000+ records)
+- Config change detection invalidates stale completed actions on prompt/model/schema change
+- Retry Ctrl+C writes manifest checkpoint for crash recovery
+- LLM hardening (token overflow guard, prompt injection fix, parse error parity across providers)
+- Source GUID uses uuid4 to prevent collision on duplicate/expanded records
+- Thread safety for ActionStateManager and atomic_json_write
+- O(n²) lineage lookup replaced with dict index
+- Dead code removed (12 functions, 11 aliases, ghost mistral directory)
+- 33 new tests covering 7 previously untested critical paths
+- 15 false-positive tests fixed
+- Observability gaps closed (record identity in logs, LLM call duration, batch events)
+- DB maintenance (WAL checkpoint, disposition cleanup, prompt trace retention)
+
+### Bug Fix
+* Batch/online content parity: first-stage batch actions now synthesize the source namespace,
+matching online mode. Fixes source.page_content resolving as null in batch workflows.
+
+* Batch disposition dedup prevents UNIQUE constraint violations on resume.
+Deferred dispositions now cleared using per-action name instead of workflow name.
+Prep failure logs show source_guid instead of array index.
+
+
 ## 0.1.12 - 2026-04-19
 ### Enhancement or New Feature
 * Release v0.1.11