fix(ml): complete ML pipeline fixes and setup

- Fix CCI indicator to use HLC prices instead of close only
- Parse datetime column when loading enriched CSV
- Strip timezone from annotation timestamps
- Fix TA-Lib pattern names (CDL3WHITESOLDIERS, CDL3BLACKCROWS)
- Exclude programmatic label columns from training features
- Fix classification report to handle missing classes
- Update MLflow tracking to use localhost:5000
- Grant PostgreSQL permissions to ml_user

Pipeline now runs successfully end-to-end:
- Feature engineering: 2543 rows, 31 columns
- Annotation ingestion: 286 samples
- Training: 89.47% test accuracy with Random Forest

services/ml/mlruns/358560345319124639/models/m-045042d4be424487a3c0ff303d90466d/meta.yaml

@@ -0,0 +1,10 @@
+artifact_location: file:///home/homoludens/projekti/bitcon/candle_annotator/services/ml/mlruns/358560345319124639/models/m-045042d4be424487a3c0ff303d90466d/artifacts
+creation_timestamp: 1771187378036
+experiment_id: '358560345319124639'
+last_updated_timestamp: 1771187384983
+model_id: m-045042d4be424487a3c0ff303d90466d
+model_type: ''
+name: model
+source_run_id: f1a0c7b223484d019564929940766c10
+status: 2
+status_message: null