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/358560345319124639/96fe834f6a2d4193ba3aebdcb94b4b7c/meta.yaml

@@ -0,0 +1,14 @@
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+end_time: 1771187220382
+entry_point_name: ''
+experiment_id: '358560345319124639'
+lifecycle_stage: active
+run_id: 96fe834f6a2d4193ba3aebdcb94b4b7c
+run_name: serious-carp-803
+source_name: ''
+source_type: 4
+source_version: ''
+start_time: 1771187220098
+status: 4
+tags: []
+user_id: homoludens