Align period handling across workflows

[erin-glen]

Motivation

• Different workflows were using inconsistent time-period sets (TCC-gated vs full adjacent NLCD endpoints), causing mismatches in produced outputs.
• Ensure insect/disease merge, Hansen-based harvest, fire expansion, and final combination consistently operate over the intended period set.
• Preserve backward compatibility for existing TCC-gated consumers while adding an explicit full-period configuration.

Description

• Added TIME_PERIODS_ALL, TIME_PERIODS_TCC, and preserved TIME_PERIODS as a back-compat alias in disturbance_config.py and introduced INSECT_TIME_PERIODS for insect/disease defaults.
• Rewired FIRE_TIME_PERIODS to expand from TIME_PERIODS_ALL so fire processing always uses the full adjacent endpoint set.
• Updated harvest_other.py and final_disturbance.py to iterate cfg.TIME_PERIODS_ALL, and updated insect_disease_merge.py to use getattr(cfg, "INSECT_TIME_PERIODS", cfg.TIME_PERIODS_ALL) for period iteration.
• Aligned run_insect_disease.py to import disturbance_config and default HARDCODED_PERIODS to the configured insect-period keys, and fixed the run_disturbance.py filename/comment inconsistency.

Testing

• No automated tests were executed as part of this change.

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Codex Task