Initial quant trader service baseline

src/test/resources/replay-fixtures/README.md

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+P0 replay fixtures
+==================
+
+These JSONL files are deterministic acceptance fixtures for the P0 replay loop.
+They are not a profitability backtest corpus. Each line is one replay clock tick
+with the schema consumed by JsonlReplayMarketEventReader:
+
+- eventTime
+- contextFeatures
+- setupFeatures
+- triggerFeatures
+- executionFeatures
+- dataQuality
+
+Scenario notes:
+
+- trend-up-breakout-happy.jsonl: accepted continuation setup; should produce one action and one sample.
+- trend-down-no-setup.jsonl: bearish regime without a valid long continuation setup; should complete with no action.
+- sideways-range-no-setup.jsonl: range regime without a setup; should complete with no action.
+- false-breakout-trigger-wait.jsonl: setup exists but trigger score is too weak; should complete with no action.
+- missing-features-data-quality.jsonl: data-quality blocker; should complete with a blocked sample.
+- incomplete-entry-plan-hard-fail.jsonl: setupPass is true but required prices are missing; should fail the replay run.