#10606: fix(matrix): keep room IDs without :server suffix as-is during resolution

## Problem Matrix room IDs that don't include a `:server` suffix (e.g. `!ontTDWE13YNwNUgi7dOmZnSluH6XCjnHBmMJPQHH7Cw`) are sent through `resolveMatrixTargets` during room config resolution, which lowercases them. The event handler then fails to match the original mixed-case room ID against the lowercased config key, silently dropping all messages for that room. This happens because the guard on line 150 requires both `startsWith("!")` AND `includes(":")`: ```js if ((cleaned.startsWith("!") || cleaned.startsWith("#")) && cleaned.includes(":")) { ``` Some Synapse configurations produce room IDs without the :server portion. These are valid room IDs but fail the colon check. ## Fix Room IDs starting with ! are always kept as-is. Only #-aliases need the :server check (since bare # without a server is ambiguous): ```js if (cleaned.startsWith("!") || (cleaned.startsWith("#") && cleaned.includes(":"))) { ``` ## Impact Any Matrix room whose ID lacks a :server suffix was completely non-functional in group allowlists. Messages were silently dropped with no log output at default verbosity. <!-- greptile_comment --> <h2>Greptile Overview</h2> <h3>Greptile Summary</h3> - Adjusts Matrix room/alias config normalization so room IDs starting with `!` are treated as already-resolved even if they lack a `:server` suffix. - Keeps `#alias` entries requiring `:server` before bypassing `resolveMatrixTargets`, avoiding ambiguous bare aliases. - Prevents mixed-case room IDs from being lowercased during resolution, which previously caused config key mismatches and silently dropped messages. - Change is localized to room config processing in `extensions/matrix/src/matrix/monitor/index.ts`. <h3>Confidence Score: 5/5</h3> - This PR is safe to merge with minimal risk. - Single-line conditional change with clear intent; verified it only affects which room entries bypass `resolveMatrixTargets`, and it resolves an actual mismatch scenario without changing other config or runtime behavior. - No files require special attention <!-- greptile_other_comments_section --> _{(2/5) Greptile learns from your feedback when you react with thumbs up/down!} <!-- /greptile_comment -->