chore(refactor): optimize memory hygiene by extracting inline Regex instances to constants

[Himanth-reddy]

Summary of Changes

• app/src/main/kotlin/com/arflix/tv/data/repository/CollectionTemplateManifest.kt: Extracted inline Regex("[^a-z0-9]+") instantiation in slugify to a top-level private object CollectionManifestRegexes.
• app/src/main/kotlin/com/arflix/tv/data/repository/HttpLocalScraperRuntime.kt: Replaced multiple inline Regex creations with references to existing or newly created companion object constants (EPISODE_DIV_REGEX, DATA_IFRAME_REGEX, PLAYER_IFRAME_REGEX, T_HASH_REGEX, etc.) to avoid recompilation.
• app/src/main/kotlin/com/arflix/tv/util/ProfileAvatarFiles.kt: Moved inline Regex("[^A-Za-z0-9._-]") into ProfileAvatarRegexes.SANITIZATION_REGEX.
• app/src/main/kotlin/com/arflix/tv/util/SubtitleScoring.kt: Extracted inline regexes (PURE_NUMBERS_RE, SUBTITLE_BRACKET_RE, SEPARATOR_RE) to file-level private constants.
• app/src/main/kotlin/com/arflix/tv/util/AppLogger.kt: Extracted Regex("[^A-Za-z0-9_.-]") into AppLoggerRegexes.FILENAME_SANITIZATION_REGEX.
• app/src/main/kotlin/com/arflix/tv/ui/screens/player/PlayerScreen.kt: Extracted Regex instances into PlayerScreenRegexes top-level private object to avoid triggering recomposition and gc pressure during render paths.

Why this improves the codebase

This explicitly fulfills the checklist directive for Memory Hygiene. By pulling heavy, immutable Regex instances out of hot paths, utility loops, and Compose functions, we drastically mitigate GC churn and avoid unnecessary regex recompilation overhead.

Verification

• Code compiles successfully inside the sandbox environment.
• No new features were added; existing features were fortified and optimized across the modified files.
• Automated tests pass.

[ProdigyV21]

This one is not ready to merge yet because it conflicts with latest main.

The conflict is in HttpLocalScraperRuntime.kt. Main already has some of the same regex cleanup, but with different constant names like DIV_EP_REGEX, IFRAME_PLAYER_REGEX, and T_HASH_T_REGEX. This PR adds similar ones again as EPISODE_DIV_REGEX, PLAYER_IFRAME_REGEX, and T_HASH_REGEX, so Git cannot merge it automatically.

Please rebase onto latest main and keep the existing regex constants/names from main instead of adding duplicate renamed versions.

The idea itself is fine and low risk: it is just moving repeated Regex(...) calls into reusable constants. After rebase and conflict cleanup, it should be safe.