fix: filters and configurable autocomplete chains

[Sh4d1]

• render Quickwit-safe filters for text phrases, simple text terms, JSON arrays, numeric arrays, boolean arrays, and scalar numeric/boolean values
• fix quick-filter toggle behavior so filter-in/filter-out matches by operator and replaces opposite filters instead of adding duplicates
• avoid mutating query filter objects when adding or toggling quick filters
• add configurable filter autocomplete limit, defaulting to 1000 and supporting 0 for no terms limit
• apply autocomplete limit to tag values and field autocomplete requests
• add filter chain mode datasource option: no chain, sampled chain, or full chain
• dedupe tag keys when fields expose multiple capabilities
• improve template multi-value interpolation for Quickwit by inferring field context and avoiding bare IN fallbacks
• add focused tests for filter rendering, quick-filter toggles, autocomplete limits, chain modes, and template interpolation