feat(rename): expand lore name pool

[RANGROO]

What

• add 1,000 new single-word lore names, expanding the built-in pool from 72 to 1,072
• seed the complete pool for fresh installs
• import only missing base names on existing installs
• preserve existing enabled/disabled states and custom overrides
• cover the importer with the existing rename-pool regression

Scope

This PR contains only the name data and the code required to seed it:

• data/rename_names_seed.csv
• data/schema.sql
• debug/db_updates.php
• lib/rename_name_pool_functions.php
• tests/rename_name_pool_regression.php

No generator, promoter, blocklist, OpenRouter integration, or generation-only CI test is included.

Dataset

• 1,072 total names
• 1,072 case-insensitive unique names
• 358 male / 357 female / 357 neutral
• all names are one ASCII word matching ^[A-Z][a-z]{2,9}$

Existing installs

Patch rename_name_pool_expansion (202607190102) reads the committed CSV and inserts only case-insensitively missing base rows. Existing base rows are not updated, so disabled state is preserved. Custom rows are untouched.

Checks

• old-install simulation: 1072:1072:1071:false after starting from 72 names with Arin disabled
• second migration run remains at 1,072 rows
• all 24 remaining PR regression tests pass
• deployed locally with database result 1072|1072|1072
• deployed CSV checksum matches this branch
• removed generation files are absent from the local deployment
• health route and Rename Names page return HTTP 200