Clean up DuckDuckGo + ProtonDrive lint debt (remove dead media_to_html import)

[abrignoni]

Summary

DuckDuckGo and ProtonDrive were already @artifact_processor but carried a stale, never-called media_to_html import — the last legacy media references anywhere in the repo. Removing it forces lint-changed-files to lint the whole file, so this also resolves each file's pre-existing pylint warnings to keep CI green. No behavior change.

ProtonDrive (7.37 → 10.00)

• Drop unused imports (os, datetime, check_in_media, open_sqlite_db_readonly, get_file_path, media_to_html, logfunc, duplicate is_platform_windows).
• Narrow file-header except Exception → except OSError; fix a 9-space indent; drop two unused row unpackings (share_id, parent_id).

DuckDuckGo (7.49 → 10.00)

• Drop unused imports (inspect, sqlite3, media_to_html, open_sqlite_db_readonly, logfunc, duplicate is_platform_windows) and two unused inspect.stack() vars.
• Remove in-function reimports (inspect/Path/datetime) that shadowed the module imports; use datetime.datetime.strptime consistently.
• Narrow file-header except → OSError and json.loads except → ValueError; keep the leveldb-open broad except with an inline disable; fix a 9-space indent.

Both

• Add a standard # pylint: disable=W0613,W0631 header for the inherent @artifact_processor signature args and the source_path loop idiom (same convention used across ALEAPP artifacts).

Validation

• ast.parse OK; 0 media_to_html references repo-wide (calls and imports).
• pylint (CI config): 10.00/10 both (was 7.37 / 7.49).
• PluginLoader: 558 (all functions still load).