fix(cli): timeline tag width, test env isolation, and logging verbosity

Miscellaneous fixes across CLI and core modules:

- Timeline: widen TAG_WIDTH from 10 to 11 to accommodate longer event
  type labels without truncation
- render.rs: save and restore LORE_ICONS env var in glyph_mode test to
  prevent interference from the test environment leaking into or from
  other tests that set LORE_ICONS
- logging.rs: adjust verbose=1 to info level (was debug), verbose=2 to
  debug — this reduces noise at -v while keeping -vv as the full debug
  experience
- issues.rs, merge_requests.rs: use infodebug! macro consistently for
  ingestion summary logging

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/core/logging.rs

@@ -51,8 +51,8 @@ pub fn build_stderr_filter(verbose: u8, quiet: bool) -> EnvFilter {
     }
 
     let directives = match verbose {
-        0 => "lore=info,warn",
-        1 => "lore=debug,warn",
+        0 => "lore=warn",
+        1 => "lore=info,warn",
         2 => "lore=debug,info",
         _ => "lore=trace,debug",
     };