Mark Firstrade execution blockers as retryable

[Pigbibi]

Summary

• classify insufficient cash for one whole share as an execution blocker
• mark blocked and partial live runs as non-terminal run states so later scheduler attempts can retry
• surface execution blockers in Telegram summaries

Tests

• .venv/bin/python -m pytest -q
• .venv/bin/python -m py_compile application/execution_service.py application/rebalance_service.py notifications/telegram.py tests/test_execution_service.py tests/test_rebalance_service.py

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Prevent partial retries from re-submitting prior orders

Persisting PARTIAL_SUBMITTED as a non-terminal stage means the same run_period is no longer idempotency-skipped on the next scheduler attempt, so a retry can execute the full plan again and submit symbols that were already submitted in the first attempt. This is especially risky when retries happen before previous orders are reflected in balances/positions, because there is no deduplication against prior submitted_orders or open orders, which can over-size live positions.

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