Improve Firstrade small-account execution notices

[Pigbibi]

Summary

• add plugin consumption i18n fallback strings
• support near-one-share small-account bootstrap for core symbols
• render explicit buy notes when whole-share compatibility lifts a target to one share

Validation

• git diff --name-only -- '*.py' | xargs -r python -m py_compile
• Firstrade render_cycle_summary bootstrap note sample
• i18n zh/en key, placeholder, and English CJK scans

Note: full platform tests were not run on this VPS because the active Python env lacks pandas/numpy/pytest.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Propagate bootstrap notes to run notifications

When the new bootstrap path fires during run_strategy_cycle (e.g., a zero-share SOXL/TQQQ/SOXX target is lifted to one limit-priced share), the symbol is written only into the adjusted plan local to execute_value_target_plan; the result that is passed to render_cycle_summary still uses the original plan.get("allocation", {}) in application/rebalance_service.py, and ExecutionCycleResult only carries cash-substitution notes. As a result, this formatter sees no small_account_whole_share_bootstrap_symbols in real cycle notifications, so the explicit buy note added here is only shown in tests that manually inject the allocation key.

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