Balance table parts outside their context

[jmanico]

Table parts that arrive inside cell content currently imply a second table instead of clearing back to the table already in scope. Related transitions leave a column group open before a row, open an orphan implied table inside a paragraph, and let </template> stop at table structure inside the template.

Return table parts to the nearest emitted table in table scope before implying wrappers, prepare orphan implied tables through normal containment, and give template ends a scope that crosses table structure while retaining raw-text feature barriers. Formatting state cleared by a template does not resume outside it. Dropped or renamed logical tables keep the prior behavior because they do not establish an output table context.

Regression coverage includes nested tables, two depths of pushed-out content, rows after columns, paragraphs around orphan parts, templates and raw-text feature barriers, SVG/MathML and integration points, dropped/renamed policies, HtmlChangeReporter, browser-tree equality, sanitizer idempotence, event balance, and nesting limits 0–5.

Validation:

• ./mvnw clean verify with Homebrew OpenJDK 11, 17, 21, and 25 after rebasing onto the The element at the nesting limit is written but its end tag is not #485 fix
• all fuzzer tests with -Djunit.seed=483, 342, and 20260911
• 13,050 deterministic differential cases with no newly non-idempotent output or unbalanced event stream

Closes #483