Add extensive tests for CLI, parser, query, server, and Badger storage behavior

[mchurichi]

Motivation

• Increase automated test coverage across the command-line layer, parsers, query logic, HTTP/WebSocket server, and Badger storage to catch regressions and clarify expected behavior.
• Verify edge cases for parsing (JSON/logfmt), Lucene-like query parsing and duration/time formats, and operational flows such as server start/shutdown, collect mode, and DB maintenance.

Description

• Added cmd/peek/main_test.go with a broad suite of tests covering validateNoPositionalArgs, parseDuration, expandPath, DB subcommands (runDbStats, runDbClean), runServerMode, runCollectMode, CLI flows via main, and helper utilities like captureStdout and isStdinPiped.
• Updated pkg/parser/parser_test.go for style cleanup and added tests including TestParseLogfmtEdgeCases and TestLogfmtParser_ParsesTimestampField, plus existing parser behavior and ID generation checks.
• Introduced pkg/query/lucene_behavior_test.go with tests for extended duration parsing, multiple time value formats, query matching semantics, token reading, range parsing, and filter edge cases.
• Introduced pkg/server/server_test.go to exercise HTTP handlers, WebSocket subscribe/broadcast flows, static asset handlers, broadcast worker behavior, and error handling when storage is unavailable.
• Introduced pkg/storage/badger_behavior_test.go to validate storage behaviors including time-range queries, field discovery, deletion APIs, subscription notifications, compaction/retention helpers, scan error propagation, and stats/expandPath behavior.

Testing

• Ran the Go test suite with go test ./... across the repository and all new and existing tests completed successfully.

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Codex Task

[github-actions]

Release Label Suggestion

Suggested label: skip-release
If merged now, estimated next tag: no tag (skip-release)
Why: No bump signal found; defaulting to skip-release (source: default policy)

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